diff --git a/README.md b/README.md
index 26c627c..e052a1e 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@ A joint effort on fundamental features (where differentiation isn't possible any
 improves quality and assures interoperability.
 
 The reference implementation addresses the following aspects:
-- Check data format and constraints according to the [CascAra meta-model](https://cascaRA.gfse.org/results/Latest%20Metamodel/) 
+- Check data format and constraints according to the [CASCaRA meta-model](https://product-information-graph.org/doc/metamodel/latest/) 
 to assure data quality. 
 - Persistently store and retrieve PIG data using the standardized API (to be defined).
 - View and edit PIG data in a web-browser.
diff --git a/package.json b/package.json
index 587a078..3be2928 100644
--- a/package.json
+++ b/package.json
@@ -1,5 +1,5 @@
 {
-  "name": "CASCaRA_PIG-App",
+  "name": "CASCaRA-App",
   "version": "0.1.0",
   "private": true,
   "scripts": {
diff --git a/public/assets/jsonld/jsonld.zip b/public/assets/jsonld/jsonld.zip
deleted file mode 100644
index 281ea6f..0000000
Binary files a/public/assets/jsonld/jsonld.zip and /dev/null differ
diff --git a/public/assets/xslt/ReqIF-to-PIG.sef.json b/public/assets/xslt/ReqIF-to-PIG.sef.json
index e763ea1..0045c41 100644
--- a/public/assets/xslt/ReqIF-to-PIG.sef.json
+++ b/public/assets/xslt/ReqIF-to-PIG.sef.json
@@ -1 +1 @@
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","line":"40","C":[{"N":"docOrder","C":[{"N":"slash","op":"/","C":[{"N":"treat","as":"N","diag":"1|0|XPTY0019|slash","C":[{"N":"varRef","name":"Q{}header","slot":"0"}]},{"N":"filter","C":[{"N":"axis","name":"child","nodeTest":"*NE"},{"N":"gc10","op":"=","comp":"GAC|http://www.w3.org/2005/xpath-functions/collation/codepoint","card":"1:1","C":[{"N":"fn","name":"local-name","C":[{"N":"dot"}]},{"N":"str","val":"REQ-IF-TOOL-ID"}]}]}]}]},{"N":"gc10","op":">","comp":"GAC|http://www.w3.org/2005/xpath-functions/collation/codepoint","card":"1:1","C":[{"N":"fn","name":"string-length","C":[{"N":"fn","name":"string","C":[{"N":"first","C":[{"N":"docOrder","C":[{"N":"slash","op":"/","C":[{"N":"treat","as":"N","diag":"1|0|XPTY0019|slash","C":[{"N":"varRef","name":"Q{}header","slot":"0"}]},{"N":"filter","C":[{"N":"axis","name":"child","nodeTest":"*NE"},{"N":"gc10","op":"=","comp":"GAC|http://www.w3.org/2005/xpath-functions/collation/codepoint","card":"1:1","C":[{"N":"fn","name":"local-name","C":[{"N":"dot"}]},{"N":"str","val":"REQ-IF-TOOL-ID"}]}]}]}]}]}]}]},{"N":"int","val":"0"}]}]},{"N":"sequence","sType":"*NT ","C":[{"N":"valueOf","sType":"1NT ","C":[{"N":"str","sType":"1AS ","val":"Created with "}]},{"N":"valueOf","flags":"l","sType":"1NT ","line":"42","C":[{"N":"fn","name":"string-join","role":"select","C":[{"N":"first","C":[{"N":"forEach","sType":"*AS ","C":[{"N":"data","sType":"*A ","C":[{"N":"mergeAdj","C":[{"N":"docOrder","sType":"*NE","role":"select","line":"42","C":[{"N":"docOrder","sType":"*NE","ns":"= xml=~ xsl=~ pig=http://product-information-graph.org dcterms=http://purl.org/dc/terms/ rdf=http://www.w3.org/1999/02/22-rdf-syntax-ns# csc=http://omg.org/CASCaRA/cas/ reqif=http://www.omg.org/spec/ReqIF/20110401/reqif.xsd ","C":[{"N":"slash","op":"/","C":[{"N":"treat","as":"N","diag":"1|0|XPTY0019|slash","C":[{"N":"varRef","name":"Q{}header","slot":"0"}]},{"N":"filter","C":[{"N":"axis","name":"child","nodeTest":"*NE"},{"N":"gc10","op":"=","comp":"GAC|http://www.w3.org/2005/xpath-functions/collation/codepoint","card":"1:1","C":[{"N":"fn","name":"local-name","C":[{"N":"dot"}]},{"N":"str","val":"REQ-IF-TOOL-ID"}]}]}]}]}]}]}]},{"N":"fn","name":"string","sType":"1AS ","C":[{"N":"dot"}]}]}]},{"N":"str","sType":"1AS ","val":" "}]}]}]},{"N":"true"},{"N":"valueOf","sType":"1NT ","C":[{"N":"str","sType":"1AS ","val":"ReqIF Document"}]}]}]},{"N":"elem","name":"dcterms:modified","sType":"1NE nQ{http://purl.org/dc/terms/}modified ","nsuri":"http://purl.org/dc/terms/","namespaces":"dcterms=http://purl.org/dc/terms/ pig=http://product-information-graph.org rdf=http://www.w3.org/1999/02/22-rdf-syntax-ns# reqif=http://www.omg.org/spec/ReqIF/20110401/reqif.xsd csc=http://omg.org/CASCaRA/cas/","line":"50","C":[{"N":"choose","sType":"? ","line":"51","C":[{"N":"docOrder","sType":"*NE","line":"51","C":[{"N":"docOrder","sType":"*NE","ns":"= xml=~ xsl=~ pig=http://product-information-graph.org dcterms=http://purl.org/dc/terms/ rdf=http://www.w3.org/1999/02/22-rdf-syntax-ns# csc=http://omg.org/CASCaRA/cas/ reqif=http://www.omg.org/spec/ReqIF/20110401/reqif.xsd ","C":[{"N":"slash","op":"/","C":[{"N":"treat","as":"N","diag":"1|0|XPTY0019|slash","C":[{"N":"varRef","name":"Q{}header","slot":"0"}]},{"N":"filter","C":[{"N":"axis","name":"child","nodeTest":"*NE"},{"N":"gc10","op":"=","comp":"GAC|http://www.w3.org/2005/xpath-functions/collation/codepoint","card":"1:1","C":[{"N":"fn","name":"local-name","C":[{"N":"dot"}]},{"N":"str","val":"CREATION-TIME"}]}]}]}]}]},{"N":"valueOf","flags":"l","sType":"1NT ","line":"52","C":[{"N":"fn","name":"string-join","role":"select","C":[{"N":"first","C":[{"N":"forEach","sType":"*AS ","C":[{"N":"data","sType":"*A ","C":[{"N":"mergeAdj","C":[{"N":"docOrder","sType":"*NE","role":"select","line":"52","C":[{"N":"docOrder","sType":"*NE","ns":"= xml=~ xsl=~ pig=http://product-information-graph.org dcterms=http://purl.org/dc/terms/ rdf=http://www.w3.org/1999/02/22-rdf-syntax-ns# csc=http://omg.org/CASCaRA/cas/ reqif=http://www.omg.org/spec/ReqIF/20110401/reqif.xsd ","C":[{"N":"slash","op":"/","C":[{"N":"treat","as":"N","diag":"1|0|XPTY0019|slash","C":[{"N":"varRef","name":"Q{}header","slot":"0"}]},{"N":"filter","C":[{"N":"axis","name":"child","nodeTest":"*NE"},{"N":"gc10","op":"=","comp":"GAC|http://www.w3.org/2005/xpath-functions/collation/codepoint","card":"1:1","C":[{"N":"fn","name":"local-name","C":[{"N":"dot"}]},{"N":"str","val":"CREATION-TIME"}]}]}]}]}]}]}]},{"N":"fn","name":"string","sType":"1AS ","C":[{"N":"dot"}]}]}]},{"N":"str","sType":"1AS ","val":" "}]}]},{"N":"true"},{"N":"empty","sType":"0 "}]}]},{"N":"elem","name":"graph","sType":"1NE nQ{}graph ","nsuri":"","namespaces":"dcterms=http://purl.org/dc/terms/ pig=http://product-information-graph.org rdf=http://www.w3.org/1999/02/22-rdf-syntax-ns# reqif=http://www.omg.org/spec/ReqIF/20110401/reqif.xsd csc=http://omg.org/CASCaRA/cas/","line":"56","C":[{"N":"applyT","sType":"* ","line":"57","mode":"#unnamed","bSlot":"1","C":[{"N":"docOrder","sType":"*NE","role":"select","line":"57","C":[{"N":"docOrder","sType":"*NE","ns":"= xml=~ xsl=~ pig=http://product-information-graph.org dcterms=http://purl.org/dc/terms/ rdf=http://www.w3.org/1999/02/22-rdf-syntax-ns# csc=http://omg.org/CASCaRA/cas/ reqif=http://www.omg.org/spec/ReqIF/20110401/reqif.xsd ","C":[{"N":"slash","op":"/","C":[{"N":"slash","op":"/","C":[{"N":"root"},{"N":"axis","name":"descendant-or-self","nodeTest":"*N"}]},{"N":"filter","C":[{"N":"axis","name":"child","nodeTest":"*NE"},{"N":"gc10","op":"=","comp":"GAC|http://www.w3.org/2005/xpath-functions/collation/codepoint","card":"1:1","C":[{"N":"fn","name":"local-name","C":[{"N":"dot"}]},{"N":"str","val":"SPEC-OBJECT"}]}]}]}]}]}]}]}]}]}]}]}]}]},{"N":"overridden"},{"N":"output","C":[{"N":"property","name":"Q{http://saxon.sf.net/}stylesheet-version","value":"10"},{"N":"property","name":"method","value":"xml"},{"N":"property","name":"encoding","value":"UTF-8"},{"N":"property","name":"indent","value":"yes"},{"N":"property","name":"standalone","value":"yes"}]},{"N":"decimalFormat"}],"Σ":"4b86ed2f"}
\ No newline at end of file
diff --git a/public/index.html b/public/index.html
index 2ebcd3a..8f398d9 100644
--- a/public/index.html
+++ b/public/index.html
@@ -3,9 +3,10 @@
 <head>
     <meta charset="utf-8" />
     <meta http-equiv="X-UA-Compatible" content="IE=edge" />
-    <base href="./"> <!-- relative paths are always relative to index.prod.html -->
+    <base href="./" /> <!-- relative paths are always relative to index.prod.html -->
     <meta name="viewport" content="width=device-width,initial-scale=1.0" />
     <link rel="icon" href="<%= BASE_URL %>favicon.ico" />
+	<link href="https://fonts.googleapis.com/css?family=Montserrat:400,700|Roboto:400,700&display=swap" rel="stylesheet" />
     <title><%= htmlWebpackPlugin.options.title %></title>
 </head>
   <body>
diff --git a/src/App.vue b/src/App.vue
index 22b33e2..4427f77 100644
--- a/src/App.vue
+++ b/src/App.vue
@@ -1,27 +1,35 @@
 <template>
     <v-app>
-        <Navigation msg="CASCaRA"/>
+        <Navigation :msg="DEF.appName" />
 
         <v-main>
             <v-container fluid>
-              <router-view></router-view>
+                <router-view></router-view>
             </v-container>
         </v-main>
     </v-app>
 </template>
 
 <script lang="ts">
-import { Vue } from 'vue-class-component';
-export default class App extends Vue {}
+    import { Vue, Options } from 'vue-class-component';
+    import { DEF } from '@/common-code/lib/definitions';
+
+    @Options({
+        computed: {
+            DEF() {
+                return DEF;
+            }
+        }
+    })
+    export default class App extends Vue { }
 </script>
 
 <style>
-#app {
-  font-family: Avenir, Helvetica, Arial, sans-serif;
-  -webkit-font-smoothing: antialiased;
-  -moz-osx-font-smoothing: grayscale;
-  text-align: center;
-  color: #2c3e50;
-  margin-top: 60px;
-}
-</style>
\ No newline at end of file
+    #app {
+        -webkit-font-smoothing: antialiased;
+        -moz-osx-font-smoothing: grayscale;
+        text-align: center;
+        color: #2c3e50;
+        margin-top: 60px;
+    }
+</style>
diff --git a/src/build-info.ts b/src/build-info.ts
index c03a833..6705845 100644
--- a/src/build-info.ts
+++ b/src/build-info.ts
@@ -1,13 +1,13 @@
 // Auto-generated by scripts/generate-build-info.js - DO NOT EDIT
-// Generated at: 2026-02-23T16:39:18.651Z
+// Generated at: 2026-02-27T14:13:52.124Z
 
 export const BUILD_INFO = {
     // from package.json:
-    appName: 'CASCaRA_PIG-App',
+    appName: 'CASCaRA-App',
     appVersion: '0.1.0',
     // from Git:
-    buildTime: '2026-02-23T16:39:18.651Z',
-    gitCommit: '6f3c2e4',
-    gitBranch: '52-installable-with-relative-links',
+    buildTime: '2026-02-27T14:13:52.124Z',
+    gitCommit: '46b49fd',
+    gitBranch: '#25-Improve-HTML-rendering',
     gitDirty: false
 };
diff --git a/src/common-code/README.md b/src/common-code/README.md
new file mode 100644
index 0000000..874df60
--- /dev/null
+++ b/src/common-code/README.md
@@ -0,0 +1,3 @@
+# Common Code
+
+This folder contains code common to all deployment packages, namely for the browser and the server.
\ No newline at end of file
diff --git a/src/common-code/import/jsonld/import-jsonld.ts b/src/common-code/import/jsonld/import-jsonld.ts
new file mode 100644
index 0000000..94c9019
--- /dev/null
+++ b/src/common-code/import/jsonld/import-jsonld.ts
@@ -0,0 +1,174 @@
+/*!
+ * Cross-environment JSON-LD importer.
+ * Copyright 2025 GfSE (https://gfse.org)
+ * License and terms of use: Apache 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ */
+/**
+ * JSON-LD Importer - Static class for importing PIG JSON-LD documents
+ * 
+ * Cross-environment JSON-LD importer:
+ * - Accepts a Node file path, an http(s) URL string or a browser File/Blob.
+ * - Extracts elements from '@graph' (or 'graph'), converts JSON-LD keys to internal keys
+ *   and instantiates matching PIG class instances where possible.
+ *
+ * Authors: oskar.dungern@gfse.org
+ * 
+ * Design Decisions:
+ * - Static class design for consistency with ReqIFImporter and XmlImporter
+ * - Direct JSON-LD processing without transformation
+ * - Validation through APackage.setJSONLD() method
+ * 
+ * Usage:
+ * - Node:   await JsonldImporter.import('C:/path/to/file.jsonld')
+ * - URL:    await JsonldImporter.import('https://example/.../doc.jsonld')
+ * - Browser: await JsonldImporter.import(fileInput.files[0])
+ */
+
+import { IRsp, rspOK, Rsp, Msg } from '../../lib/messages';
+import { LOG } from '../../lib/helpers';
+import { PIN } from '../../lib/platform-independence';
+import { APackage, TPigItem } from '../../schema/pig/ts/pig-metaclasses';
+import { SCH_LD } from '../../schema/pig/jsonld/pig-schemata-jsonld';
+
+/**
+ * JSON-LD document structure
+ */
+interface JsonLdDocument {
+    '@context'?: unknown;
+    '@graph'?: unknown[];
+    '@id'?: string;
+    '@type'?: string | string[];
+    [key: string]: unknown;
+}
+
+/**
+ * JSON-LD Importer
+ * Static class for importing and parsing PIG JSON-LD documents
+ */
+export class JsonldImporter {
+    /**
+     * Import JSON-LD document and instantiate PIG items
+     * 
+     * @param source - File path (Node.js), URL, or File/Blob object (Browser)
+     * @returns IRsp containing array of TPigItem (first item is APackage, rest are graph items)
+     * 
+     * @example
+     * // Node.js
+     * const result = await JsonldImporter.import('./package.jsonld');
+     * 
+     * @example
+     * // Browser
+     * const file = fileInput.files[0];
+     * const result = await JsonldImporter.import(file);
+     * 
+     * @example
+     * // URL
+     * const result = await JsonldImporter.import('https://example.org/data.jsonld');
+     */
+    static async import(source: string | File | Blob): Promise<IRsp> {
+        // Read file content
+        const rsp = await PIN.readFileAsText(source);
+        if (!rsp.ok) {
+            return rsp;
+        }
+
+        const text = rsp.response as string;
+
+        // Parse JSON document
+        let doc: JsonLdDocument;
+        try {
+            doc = JSON.parse(text) as JsonLdDocument;
+        } catch (err: unknown) {
+            const errorMessage = err instanceof Error ? err.message : String(err);
+            return Msg.create(690, 'JSON-LD', errorMessage);
+        }
+
+        // Validate JSON-LD document structure
+        const validationResult = await this.validateJsonLdDocument(doc);
+        if (!validationResult.ok) {
+            return validationResult;
+        }
+
+        // Instantiate APackage and load the document
+        const aPackage = new APackage().setJSONLD(doc);
+
+        // Check if package was successfully created
+        if (!aPackage.status().ok) {
+            return aPackage.status();
+        }
+
+        // Get all items (package + graph items)
+        const allItems = aPackage.getItems();
+
+        // Calculate import statistics
+        const expectedCount = doc['@graph']?.length || 0;
+        const actualCount = allItems.length - 1; // -1 for package itself
+
+        // Build result response
+        let result: IRsp;
+        if (actualCount === expectedCount) {
+            LOG.info(
+                `JsonldImporter: successfully imported package with all ${actualCount} items`
+            );
+            result = Rsp.create(0, allItems, 'json', 'JSON-LD', actualCount, expectedCount);
+        } else {
+            // Log details about erroneous items
+            const errorDetails = this.buildErrorReport(allItems);
+            LOG.warn(
+                `JsonldImporter: imported ${actualCount} of ${expectedCount} items${errorDetails}`
+            );
+
+            result = Rsp.create(691, allItems, 'json', 'JSON-LD', actualCount, expectedCount);
+        }
+
+        return result as IRsp<TPigItem[]>;
+    }
+
+    /**
+     * Validate JSON-LD document structure
+     * 
+     * Checks for:
+     * - Valid @context
+     * - Valid @graph structure
+     * - Schema compliance
+     * 
+     * @param doc - Parsed JSON-LD document
+     * @returns IRsp indicating success or error
+     * @private
+     */
+    private static async validateJsonLdDocument(doc: JsonLdDocument): Promise<IRsp> {
+        // Validate entire JSON-LD document structure using schema
+        const isValidPackage = await SCH_LD.validatePackageLD(doc);
+
+        if (!isValidPackage) {
+            const errors = await SCH_LD.getValidatePackageLDErrors();
+            LOG.error('JSON-LD package validation failed:', errors);
+            return Msg.create(697, 'JSON-LD', errors);
+        }
+
+        return rspOK;
+    }
+
+    /**
+     * Build detailed error report for failed items
+     * 
+     * @param allItems - All items including package
+     * @returns Formatted error report string
+     * @private
+     */
+    private static buildErrorReport(allItems: TPigItem[]): string {
+        let errorReport = '\nErroneous items:';
+
+        for (let i = 1; i < allItems.length; i++) {
+            const status = allItems[i].status();
+            if (!status.ok) {
+                errorReport += `\n- graph[${i}]: (${status.status}) ${status.statusText}`;
+            }
+        }
+
+        return errorReport;
+    }
+}
+
+// Export convenience function for backward compatibility
+// export const importJSONLD = JsonldImporter.import.bind(JsonldImporter);
diff --git a/src/common-code/import/reqif/import-reqif.ts b/src/common-code/import/reqif/import-reqif.ts
new file mode 100644
index 0000000..c9d511b
--- /dev/null
+++ b/src/common-code/import/reqif/import-reqif.ts
@@ -0,0 +1,219 @@
+/*!
+ * Imports a ReqIF XML document and transforms it using the ReqIF-to-PIG stylesheet.
+ * Copyright 2025 GfSE (https://gfse.org)
+ * License and terms of use: Apache 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ * We appreciate any correction, comment or contribution as Github issue (https://github.com/GfSE/CASCaDE-Reference-Implementation/issues)
+ */
+/**
+ * ReqIF Importer - Static class for importing ReqIF documents
+ * 
+ * Imports a ReqIF XML document and transforms it using a ReqIF-to-PIG stylesheet.
+ * Authors: oskar.dungern@gfse.org
+ * 
+ * Security note: Uses saxon-js which has a transitive dependency on @xmldom/xmldom
+ * with known vulnerabilities. Input is validated and size-limited. See docs/SECURITY.md
+ * - The build configuration via package.json loads a newer version of xmldom without critical vulnerability
+ *   replacing the dependency of saxon-js.
+ *
+ * Design Decisions:
+ * - SEF stylesheet is loaded from public/assets/xslt/ in both environments
+ * - Browser: fetches via HTTP from /assets/xslt/
+ * - Node.js: reads from local public/assets/xslt/ directory
+ * - Single source of truth: SEF file stored only in public/assets/xslt/
+ * - Static class design for consistency with other importers
+ * - Source file is loaded inside (like importXML and importJSONLD), for consistency.
+ * 
+ * ToDo:
+ * - Extend the constraint checks - very limited now.
+ */
+
+import { LOG } from '../../lib/helpers';
+import { PIN } from '../../lib/platform-independence';
+import { IRsp, Msg, Rsp /*, rspOK*/ } from '../../lib/messages';
+import { APackage /*, TPigItem*/ } from '../../schema/pig/ts/pig-metaclasses';
+import { ConstraintCheckType } from '../../schema/pig/ts/pig-package-constraints';
+
+/**
+ * ReqIF Importer
+ * Static class for importing and transforming ReqIF documents to PIG format
+ */
+export class ReqifImporter {
+    private static readonly MAX_XML_SIZE = 4 * 1024 * 1024; // 4MB
+
+    /**
+     * Import ReqIF document and transform to PIG items
+     * 
+     * @param source - File path (Node.js), URL, or File/Blob object (Browser)
+     * @returns IRsp containing array of TPigItem (first item is APackage, rest are graph items)
+     * 
+     * @example
+     * // Node.js
+     * const result = await ReqIFImporter.import('./test.reqif');
+     * 
+     * @example
+     * // Browser
+     * const file = fileInput.files[0];
+     * const result = await ReqIFImporter.import(file);
+     */
+    static async import(source: string | File): Promise<IRsp<unknown>> {
+        // Extract filename for validation and logging
+        const filename = typeof source === 'string' ? source : source.name;
+
+        // Normalize filename/URL for extension check:
+        // - Strip query/fragment (for URLs)
+        // - Make case-insensitive
+        const normalized = filename.split(/[?#]/, 1)[0].toLowerCase();
+
+        // Validate file extension
+        if (!normalized.endsWith('.reqif')) {
+            return Msg.create(660, filename, 'expected .reqif file extension');
+        }
+
+        // Read file content
+        const rspRead = await PIN.readFileAsText(source);
+        if (!rspRead.ok) {
+            return rspRead;
+        }
+
+        const xmlToTransform = rspRead.response as string;
+
+        // Security: Size limit check
+        if (xmlToTransform.length > this.MAX_XML_SIZE) {
+            return Msg.create(
+                660,
+                filename,
+                `file too large (max ${this.MAX_XML_SIZE / 1024 / 1024}MB)`
+            );
+        }
+
+        // Security: Basic XML structure validation
+        const trimmed = xmlToTransform.trim();
+        if (!trimmed.startsWith('<?xml') && !trimmed.startsWith('<')) {
+            return Msg.create(660, filename, 'invalid XML structure');
+        }
+
+        // Parse XML document
+        const parser = PIN.createDOMParser();
+        const xmlDoc = parser.parseFromString(xmlToTransform, 'text/xml');
+
+        // Check for parsing errors
+        const sourceError = PIN.getXmlParseError(xmlDoc);
+        if (sourceError) {
+            return Msg.create(
+                660,
+                filename,
+                sourceError.textContent ?? 'Unknown XML parsing error'
+            );
+        }
+
+        // Validate ReqIF document structure
+        if (!this.isValid(xmlDoc)) {
+            return Msg.create(
+                660,
+                filename,
+                'missing required ReqIF namespace or root element'
+            );
+        }
+
+        // Get stylesheet path and transform document
+        const stylesheetPath = this.getStylesheetPath();
+        LOG.debug(`ReqIFImporter: using stylesheet path: ${stylesheetPath}`);
+
+        const rspTransform = await PIN.transformXSL(xmlToTransform, stylesheetPath);
+        if (!rspTransform.ok) {
+            return Msg.create(
+                660,
+                filename,
+                rspTransform.statusText ?? 'Transformation failed'
+            );
+        }
+
+        const xmlString = rspTransform.response as string;
+
+        // Instantiate APackage from transformed XML
+        const aPackage = new APackage().setXML(xmlString, {
+            checkConstraints: [
+                ConstraintCheckType.UniqueIds
+                // Input has only instances, so omit constraint checks on classes
+                //    ConstraintCheckType.aPropertyHasClass,
+                //    ConstraintCheckType.aLinkHasClass,
+                //    ConstraintCheckType.anEntityHasClass,
+                //    ConstraintCheckType.aRelationshipHasClass,
+            ] as ConstraintCheckType[]
+        });
+
+        // Check if package was successfully created
+        if (!aPackage.status().ok) {
+            return aPackage.status();
+        }
+
+        // Get all items (package + graph items)
+        const allItems = aPackage.getItems();
+
+        // Calculate import statistics
+        const expectedCount = aPackage.graph?.length || 0;
+        const actualCount = allItems.length - 1; // -1 for package itself
+
+        LOG.info(
+            `ReqIFImporter: successfully imported ${filename} with ${actualCount} of ${expectedCount} items`
+        );
+
+        // Return success response with items (clone rspOK to avoid shared-state mutation)
+        const result = Rsp.create(0, allItems, 'json', 'ReqIF', actualCount, expectedCount);
+        return result;
+    }
+
+    /**
+     * Get platform-specific path to ReqIF-to-PIG stylesheet
+     * 
+     * @returns Path/URL to ReqIF-to-PIG.sef.json
+     * @private
+     */
+    private static getStylesheetPath(): string {
+        if (PIN.isBrowserEnv()) {
+            // Browser: fetch from public directory via HTTP
+            const baseUrl = window.location.origin;
+            return `${baseUrl}/assets/xslt/ReqIF-to-PIG.sef.json`;
+        } else {
+            // Node.js: read from local public directory
+            return './public/assets/xslt/ReqIF-to-PIG.sef.json';
+        }
+    }
+
+    /**
+     * Validate that the XML document is a valid ReqIF document
+     * 
+     * Checks for:
+     * - ReqIF namespace (http://www.omg.org/spec/ReqIF/20110401/reqif.xsd)
+     * - REQ-IF root element
+     * 
+     * @param xmlDoc - The XML document to validate
+     * @returns True if the document is a valid ReqIF document
+     * @private
+     */
+    private static isValid(xmlDoc: Document): boolean {
+        const rootElement = xmlDoc.documentElement;
+
+        if (!rootElement) {
+            return false;
+        }
+
+        // Check for ReqIF namespace
+        const reqifNamespace = 'http://www.omg.org/spec/ReqIF/20110401/reqif.xsd';
+        const hasReqIFNamespace =
+            rootElement.namespaceURI === reqifNamespace ||
+            rootElement.getAttribute('xmlns') === reqifNamespace ||
+            rootElement.lookupNamespaceURI('reqif') === reqifNamespace;
+
+        // Check for REQ-IF root element
+        const isReqIFRoot =
+            rootElement.localName === 'REQ-IF' ||
+            rootElement.tagName === 'REQ-IF' ||
+            rootElement.tagName === 'reqif:REQ-IF';
+
+        return hasReqIFNamespace && isReqIFRoot;
+    }
+}
+
+// Export convenience function for backward compatibility
+// export const importReqif = ReqifImporter.import.bind(ReqifImporter);
diff --git a/src/common-code/import/xml/import-xml.ts b/src/common-code/import/xml/import-xml.ts
new file mode 100644
index 0000000..d730227
--- /dev/null
+++ b/src/common-code/import/xml/import-xml.ts
@@ -0,0 +1,153 @@
+/*!
+ * Cross-environment XML importer.
+ * Copyright 2025 GfSE (https://gfse.org)
+ * License and terms of use: Apache 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ */
+/**
+ * XML Importer - Static class for importing PIG XML documents
+ * 
+ * Cross-environment XML importer:
+ * - Accepts a Node file path, an http(s) URL string or a browser File/Blob.
+ * - Parses XML document, converts XML structure to internal keys
+ *   and instantiates matching PIG class instances where possible.
+ *
+ * Authors: oskar.dungern@gfse.org
+ * 
+ * Design Decisions:
+ * - Static class design for consistency with ReqIFImporter
+ * - Direct parsing without XSLT transformation (unlike ReqIF)
+ * - Validation through APackage.setXML() method
+ * 
+ * Usage:
+ * - Node:   await XmlImporter.import('C:/path/to/file.xml')
+ * - URL:    await XmlImporter.import('https://example/.../doc.xml')
+ * - Browser: await XmlImporter.import(fileInput.files[0])
+ */
+
+import { IRsp, Rsp, Msg, rspOK } from '../../lib/messages';
+import { LOG } from '../../lib/helpers';
+import { PIN } from '../../lib/platform-independence';
+import { APackage, TPigItem } from '../../schema/pig/ts/pig-metaclasses';
+
+/**
+ * XML Importer
+ * Static class for importing and parsing PIG XML documents
+ */
+export class XmlImporter {
+    /**
+     * Import XML document and instantiate PIG items
+     * 
+     * @param source - File path (Node.js), URL, or File/Blob object (Browser)
+     * @returns IRsp containing array of TPigItem (first item is APackage, rest are graph items)
+     * 
+     * @example
+     * // Node.js
+     * const result = await XmlImporter.import('./package.xml');
+     * 
+     * @example
+     * // Browser
+     * const file = fileInput.files[0];
+     * const result = await XmlImporter.import(file);
+     * 
+     * @example
+     * // URL
+     * const result = await XmlImporter.import('https://example.org/data.xml');
+     */
+    static async import(source: string | File | Blob): Promise<IRsp> {
+        // Read file content
+        const rsp = await PIN.readFileAsText(source);
+        if (!rsp.ok) {
+            return rsp;
+        }
+
+        const xmlString = rsp.response as string;
+
+        // Validate XML syntax
+        const validationResult = this.validateXmlSyntax(xmlString);
+        if (!validationResult.ok) {
+            return validationResult;
+        }
+
+        // Instantiate APackage directly from XML string
+        // APackage.setXML() handles:
+        // - XML to JSON conversion
+        // - Schema validation
+        // - Constraint checking
+        // - Graph item instantiation
+        const aPackage = new APackage().setXML(xmlString);
+
+        // Get all items (package + graph items)
+        const allItems = aPackage.getItems();
+
+        // Calculate import statistics
+        const expectedCount = aPackage.graph?.length || 0;
+        const actualCount = allItems.length - 1; // -1 for package itself
+
+        // Build result response
+        let result: IRsp;
+        if (actualCount === expectedCount) {
+            LOG.info(
+                `XmlImporter: successfully imported package with all ${actualCount} items`
+            );
+            result = Rsp.create(0, allItems, 'json');
+        } else {
+            // Log details about erroneous items
+            const errorDetails = this.buildErrorReport(allItems);
+            LOG.warn(
+                `XmlImporter: imported ${actualCount} of ${expectedCount} items${errorDetails}`
+            );
+
+            result = Rsp.create(691, allItems, 'json', 'XML', actualCount, expectedCount);
+        }
+
+        return result as IRsp<TPigItem[]>;
+    }
+
+    /**
+     * Validate XML syntax before parsing
+     * 
+     * @param xmlString - XML string to validate
+     * @returns IRsp indicating success or error
+     * @private
+     */
+    private static validateXmlSyntax(xmlString: string): IRsp {
+        try {
+            const parser = PIN.createDOMParser();
+            const doc = parser.parseFromString(xmlString, 'text/xml');
+            const parserError = PIN.getXmlParseError(doc);
+
+            if (parserError) {
+                const errorMessage =
+                    parserError.textContent || 'Unknown XML parsing error';
+                return Msg.create(690, 'XML', errorMessage);
+            }
+
+            return rspOK;
+        } catch (err: any) {
+            return Msg.create(690, 'XML', err?.message ?? String(err));
+        }
+    }
+
+    /**
+     * Build detailed error report for failed items
+     * 
+     * @param allItems - All items including package
+     * @returns Formatted error report string
+     * @private
+     */
+    private static buildErrorReport(allItems: TPigItem[]): string {
+        let errorReport = '\nErroneous items:';
+
+        for (let i = 1; i < allItems.length; i++) {
+            const status = allItems[i].status();
+            if (!status.ok) {
+                errorReport += `\n- graph[${i}]: (${status.status}) ${status.statusText}`;
+            }
+        }
+
+        return errorReport;
+    }
+}
+
+// Export convenience function for backward compatibility
+// export const importXML = XmlImporter.import.bind(XmlImporter);
diff --git a/src/utils/lib/definitions.ts b/src/common-code/lib/definitions.ts
similarity index 98%
rename from src/utils/lib/definitions.ts
rename to src/common-code/lib/definitions.ts
index ffa358e..b72457a 100644
--- a/src/utils/lib/definitions.ts
+++ b/src/common-code/lib/definitions.ts
@@ -10,7 +10,7 @@ export const DEF = {
     // Default for local terms (names) without an explicit namespace
     defaultDataNamespace: PIG_DOMAIN + 'default/data#',  // for data instances with prefix d:
     defaultOntologyNamespace: PIG_DOMAIN + 'default/ontology#',  // for (application or project) ontology terms with prefix o:
-    pigVersion: '2026-02-12',
+    pigVersion: '2026-02-23',
     ...BUILD_INFO
 };
 
diff --git a/src/utils/lib/helpers.ts b/src/common-code/lib/helpers.ts
similarity index 100%
rename from src/utils/lib/helpers.ts
rename to src/common-code/lib/helpers.ts
diff --git a/src/utils/lib/messages.ts b/src/common-code/lib/messages.ts
similarity index 98%
rename from src/utils/lib/messages.ts
rename to src/common-code/lib/messages.ts
index 0a202ff..95e658e 100644
--- a/src/utils/lib/messages.ts
+++ b/src/common-code/lib/messages.ts
@@ -5,19 +5,19 @@
  * We appreciate any correction, comment or contribution as Github issue (https://github.com/GfSE/CASCaDE-Reference-Implementation/issues)
  */
 /** Product Information Graph (PIG) - Centralized error and status messages
-*   Dependencies: none (self-contained)
-*   Authors: oskar.dungern@gfse.org
-*   License and terms of use: Apache 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
-*
-*   Design Decisions:
-*   - All PIG validation and error messages centralized here
-*   - Status codes 600-699 reserved for PIG-specific messages
-*   - Messages are parameterized for flexibility
-*   - Self-contained with IRsp definition to avoid circular dependencies
-*   - Msg: for responses without payload (status/statusText only)
-*   - Rsp: for responses with payload (response/responseType)
-*   - Multi-language support: en, de, fr, es
-*/
+ *  Dependencies: none (self-contained)
+ *  Authors: oskar.dungern@gfse.org
+ *  License and terms of use: Apache 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ *
+ *  Design Decisions:
+ *  - All PIG validation and error messages centralized here
+ *  - Status codes 600-699 reserved for PIG-specific messages
+ *  - Messages are parameterized for flexibility
+ *  - Self-contained with IRsp definition to avoid circular dependencies
+ *  - Msg: for responses without payload (status/statusText only)
+ *  - Rsp: for responses with payload (response/responseType)
+ *  - Multi-language support: en, de, fr, es
+ */
 
 /** IRsp interface
  * An xhr-like object to return the result of the import;
diff --git a/src/utils/lib/mvf.ts b/src/common-code/lib/mvf.ts
similarity index 100%
rename from src/utils/lib/mvf.ts
rename to src/common-code/lib/mvf.ts
diff --git a/src/utils/lib/platform-independence.ts b/src/common-code/lib/platform-independence.ts
similarity index 100%
rename from src/utils/lib/platform-independence.ts
rename to src/common-code/lib/platform-independence.ts
diff --git a/src/utils/schemas/pig/index.html b/src/common-code/schema/pig/index.html
similarity index 98%
rename from src/utils/schemas/pig/index.html
rename to src/common-code/schema/pig/index.html
index 1e6f84a..1b1ae5b 100644
--- a/src/utils/schemas/pig/index.html
+++ b/src/common-code/schema/pig/index.html
@@ -304,10 +304,10 @@ <h2>Key Features</h2>
             </section>
 <!--
             <section>
-                <h2>Formats and Schemas</h2>
+                <h2>Formats and Schemata</h2>
                 <ul class="resources-list">
                     <li>
-                        <a href="./pig/schema/2026-01-12/jsonld/">JSON-LD Schemas (Draft-07)</a>
+                        <a href="./pig/schema/2026-01-12/jsonld/">JSON-LD Schemata (Draft-07)</a>
                         <div class="description">Complete JSON Schema validation for all PIG metamodel classes and instances</div>
 																																								
 
@@ -317,7 +317,7 @@ <h2>Formats and Schemas</h2>
 						
                     </li>
                     <li>
-                        <a href="./pig/schema/2026-01-12/rdf/">RDF/Turtle Schemas with SHACL</a>
+                        <a href="./pig/schema/2026-01-12/rdf/">RDF/Turtle Schemata with SHACL</a>
                         <div class="description">SHACL shapes for validating RDF-based PIG data</div>
 																																											  
 																																											 
@@ -374,8 +374,8 @@ <h2>Standards and Ontologies</h2>
 
             <div class="cta">
                 <h3>Get Started with PIG</h3>
-                <p>Explore the schemas, examples, and documentation</p>
-                <a href="./pig/schema/2026-01-12/jsonld/">JSON-LD Schemas</a>
+                <p>Explore the schemata, examples, and documentation</p>
+                <a href="./pig/schema/2026-01-12/jsonld/">JSON-LD Schemata</a>
                 <a href="https://github.com/GfSE/CASCaDE-Verification-and-Validation" target="_blank">GitHub Repository</a>
                 <a href="./literature/">Literature</a>
             </div>
diff --git a/src/utils/schemas/pig/json/pig-schemata.ts b/src/common-code/schema/pig/json/pig-schemata.ts
similarity index 98%
rename from src/utils/schemas/pig/json/pig-schemata.ts
rename to src/common-code/schema/pig/json/pig-schemata.ts
index 2616ac0..65cb095 100644
--- a/src/utils/schemas/pig/json/pig-schemata.ts
+++ b/src/common-code/schema/pig/json/pig-schemata.ts
@@ -38,7 +38,7 @@ const ID_NAME_PATTERN = '^(?:[A-Za-z0-9_\\-]+:[^:\\s]+|https?:\\/\\/[^\\s]+)$';
 /* PROPERTY_SCHEMA: describes IProperty (pig:Property) */
 const PROPERTY_SCHEMA = {
     $schema: 'http://json-schema.org/draft-07/schema#',
-    $id: 'https://gfse.org/schemas/pig/IProperty',
+    $id: 'https://gfse.org/schema/pig/IProperty',
     type: 'object',
     properties: {
         id: { $ref: '#/$defs/idString' },
@@ -160,7 +160,7 @@ const validatePropertySchema = ajv.compile(PROPERTY_SCHEMA);
 /* LINK_SCHEMA: describes IReference (pig:Link) */
 const LINK_SCHEMA = {
     $schema: 'http://json-schema.org/draft-07/schema#',
-    $id: 'https://gfse.org/schemas/pig/IReference',
+    $id: 'https://gfse.org/schema/pig/IReference',
     type: 'object',
     properties: {
         id: { $ref: '#/$defs/idString' },
@@ -219,7 +219,7 @@ const validateLinkSchema = ajv.compile(LINK_SCHEMA);
 /* ENTITY_SCHEMA: describes IEntity (pig:Entity) */
 const ENTITY_SCHEMA = {
     $schema: 'http://json-schema.org/draft-07/schema#',
-    $id: 'https://gfse.org/schemas/pig/IEntity',
+    $id: 'https://gfse.org/schema/pig/IEntity',
     type: 'object',
     properties: {
         id: { $ref: '#/$defs/idString' },
@@ -291,7 +291,7 @@ const validateEntitySchema = ajv.compile(ENTITY_SCHEMA);
 /* RELATIONSHIP_SCHEMA: describes IRelationship (pig:Relationship) */
 const RELATIONSHIP_SCHEMA = {
     $schema: 'http://json-schema.org/draft-07/schema#',
-    $id: 'https://gfse.org/schemas/pig/IRelationship',
+    $id: 'https://gfse.org/schema/pig/IRelationship',
     type: 'object',
     properties: {
         id: { $ref: '#/$defs/idString' },
@@ -363,7 +363,7 @@ const validateRelationshipSchema = ajv.compile(RELATIONSHIP_SCHEMA);
  */
 const ANENTITY_SCHEMA = {
     $schema: 'http://json-schema.org/draft-07/schema#',
-    $id: 'https://gfse.org/schemas/pig/IAnEntity',
+    $id: 'https://gfse.org/schema/pig/IAnEntity',
     type: 'object',
     properties: {
         id: { $ref: '#/$defs/idString' },
@@ -477,7 +477,7 @@ const validateAnEntitySchema = ajv.compile(ANENTITY_SCHEMA);
 /* ARELATIONSHIP_SCHEMA: describes IARelationship (pig:aRelationship) */
 const ARELATIONSHIP_SCHEMA = {
     $schema: 'http://json-schema.org/draft-07/schema#',
-    $id: 'https://gfse.org/schemas/pig/IARelationship',
+    $id: 'https://gfse.org/schema/pig/IARelationship',
     type: 'object',
     properties: {
         id: { $ref: '#/$defs/idString' },
@@ -540,6 +540,7 @@ const ARELATIONSHIP_SCHEMA = {
         hasSourceLink: {
             type: 'array',
             minItems: 1,
+            maxItems: 1,
             items: {
                 type: 'object',
                 properties: {
@@ -557,6 +558,7 @@ const ARELATIONSHIP_SCHEMA = {
         hasTargetLink: {
             type: 'array',
             minItems: 1,
+            maxItems: 1,
             items: {
                 type: 'object',
                 properties: {
@@ -600,7 +602,7 @@ const validateARelationshipSchema = ajv.compile(ARELATIONSHIP_SCHEMA);
 /* APACKAGE_SCHEMA: describes IAPackage (pig:aPackage) */
 const APACKAGE_SCHEMA = {
     $schema: 'http://json-schema.org/draft-07/schema#',
-    $id: 'https://gfse.org/schemas/pig/IAPackage',
+    $id: 'https://gfse.org/schema/pig/IAPackage',
     type: 'object',
     properties: {
         context: {
diff --git a/src/utils/schemas/pig/jsonld/pig-schemata-jsonld.ts b/src/common-code/schema/pig/jsonld/pig-schemata-jsonld.ts
similarity index 90%
rename from src/utils/schemas/pig/jsonld/pig-schemata-jsonld.ts
rename to src/common-code/schema/pig/jsonld/pig-schemata-jsonld.ts
index 8992662..63faac5 100644
--- a/src/utils/schemas/pig/jsonld/pig-schemata-jsonld.ts
+++ b/src/common-code/schema/pig/jsonld/pig-schemata-jsonld.ts
@@ -3,7 +3,7 @@
  * License and terms of use: Apache 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
  */
 /** JSON-LD SCHEMATA for PIG items: Property, Link, Entity, Relationship, AnEntity, ARelationship
- *  These schemas validate the JSON-LD representation (with @id, @type, @value, etc.)
+ *  These schemata validate the JSON-LD representation (with @id, @type, @value, etc.)
  *
  *  Dependencies: ajv (Another JSON Schema Validator) https://ajv.js.org/
  *  Authors: oskar.dungern@gfse.org, ..
@@ -16,7 +16,7 @@
  * - this allows separate validation of incoming/outgoing JSON-LD documents
  * - use JSON Schema draft-07 (widely supported)
  * - use ajv for validation (fast, popular)
- * - these schemas validate JSON-LD documents (@graph, @context, @id, @type)
+ * - these schemata validate JSON-LD documents (@graph, @context, @id, @type)
  * - schemata are loaded from external JSON files in public/assets/jsonld/
  * - Browser: fetches via HTTP from /assets/jsonld/
  * - Node.js: reads from local public/assets/jsonld/ directory
@@ -70,7 +70,7 @@ const SCHEMA_FILE_NAMES = {
 } as const;
 
 // Build full paths for schema files
-const SCHEMA_FILES = Object.fromEntries(
+export const SCHEMA_FILES = Object.fromEntries(
     Object.entries(SCHEMA_FILE_NAMES).map(([key, filename]) => [
         key,
         `${getSchemaBasePath()}${filename}`
@@ -80,7 +80,7 @@ const SCHEMA_FILES = Object.fromEntries(
 // Type for schema keys
 type SchemaKey = keyof typeof SCHEMA_FILE_NAMES;
 
-// Cache for loaded schemas
+// Cache for loaded schemata
 const schemaCache: Partial<Record<SchemaKey, any>> = {};
 
 /**
@@ -116,42 +116,40 @@ async function loadSchema(schemaKey: SchemaKey): Promise<any> {
 }
 
 /**
- * Load all schemas from JSON files
- * @returns Promise resolving to an object with all loaded schemas
+ * Load all schemata from JSON files
+ * @returns Promise resolving to an object with all loaded schemata
  */
-async function loadAllSchemas(): Promise<Record<SchemaKey, any>> {
-    const schemas = {} as Record<SchemaKey, any>;
-
+async function loadAllSchemata(): Promise<Record<SchemaKey, any>> {
+    const schemata = {} as Record<SchemaKey, any>;
     for (const key of Object.keys(SCHEMA_FILE_NAMES) as SchemaKey[]) {
-        schemas[key] = await loadSchema(key);
+        schemata[key] = await loadSchema(key);
     }
 
-    return schemas;
+    return schemata;
 }
 
 /**
- * Initialize and register all schemas with AJV
+ * Initialize and register all schemata with AJV
  * Must be called before using any validators
  */
-async function initializeSchemas(): Promise<void> {
-    const schemas = await loadAllSchemas();
-
-    // Register all schemas with AJV
-    ajv.addSchema(schemas.Property);
-    ajv.addSchema(schemas.Link);
-    ajv.addSchema(schemas.Entity);
-    ajv.addSchema(schemas.Relationship);
-    ajv.addSchema(schemas.AnEntity);
-    ajv.addSchema(schemas.ARelationship);
-    ajv.addSchema(schemas.APackage);
+async function initializeSchemata(): Promise<void> {
+    const schemata = await loadAllSchemata();
+    // Register all schemata with AJV
+    ajv.addSchema(schemata.Property);
+    ajv.addSchema(schemata.Link);
+    ajv.addSchema(schemata.Entity);
+    ajv.addSchema(schemata.Relationship);
+    ajv.addSchema(schemata.AnEntity);
+    ajv.addSchema(schemata.ARelationship);
+    ajv.addSchema(schemata.APackage);
 }
 
-// Initialize schemas on module load
+// Initialize schemata on module load
 let initializationPromise: Promise<void> | null = null;
 
 function ensureInitialized(): Promise<void> {
     if (!initializationPromise) {
-        initializationPromise = initializeSchemas();
+        initializationPromise = initializeSchemata();
     }
     return initializationPromise;
 }
@@ -313,11 +311,8 @@ export const SCH_LD = {
         return ajv.errorsText(validator.errors, { separator: '; ' });
     },
 
-    // Utility: Ensure all schemas are loaded
+    // Utility: Ensure all schemata are loaded
     async initialize(): Promise<void> {
         await ensureInitialized();
     }
 };
-
-// Export schema path for external use
-export { SCHEMA_FILES };
diff --git a/src/utils/schemas/pig/ts/pig-metaclasses.ts b/src/common-code/schema/pig/ts/pig-metaclasses.ts
similarity index 98%
rename from src/utils/schemas/pig/ts/pig-metaclasses.ts
rename to src/common-code/schema/pig/ts/pig-metaclasses.ts
index e6dddc4..f31f348 100644
--- a/src/utils/schemas/pig/ts/pig-metaclasses.ts
+++ b/src/common-code/schema/pig/ts/pig-metaclasses.ts
@@ -18,6 +18,8 @@
  *  - Both 'AProperty' and 'ALink' have no identifier and no revision history of their own.
  *  - Other objects are referenced by URIs (TPigId) to avoid inadvertant duplication of objects ... at the cost of repeated cache access.
  *    This means the code must resolve any reference by reading the referenced object explicitly from cache, when needed.
+ *  - aRelationship.hasSourceLink is an array with maxCount=1 to have the same structure as anEntity.hasSourceLink.
+ *  - same for eligibleTargetLink
  *  - To avoid access to the cache in the validation methods, the validation of references to classes shall be done in an overall consistency check
  *    before the items are instantiated here.
  *  - Links to other items are stored as simple strings (the URIs) to avoid deep object graphs;
@@ -28,13 +30,19 @@
  *  - Programming errors result in exceptions, data errors in IMsg return values.
  *
  *  ToDo:
+ *  - Must a Link specify minCount and maxCount for hasEndpoint of its instances? How to handle cardinality of links in the overall consistency check? 
+ *  - implement 'composes' (formerly composedProperty) for Property and AProperty
  *  - Check use of normalizeId() in the setJSONLD() thread
  *  - normalizeId() shortly before validate() in set() ?
  *  - Check the result of normalizeId in the setXML() thread in case of eligible values: must be 'o:'
+ *  - Reconsider aSourceLink and aTargetLink use: empty list means none allowed and no list means all allowed?
  *  - Add dummy namespaces for 'o:' and 'd:' in case they have been added to a package with local names
  *  - allow packages to be nested
  *  - Consider the storage of numeric and boolean values: should be string?
  *  - Consider the storage of namespaces: now object with properties tag and uri: should be objects with {tag: uri}?
+ *  - Consider: In the schemata, additionalProperties=false is widely used. This prevents upward compatibility.
+ *    This code could just *ignore* additional properties.
+ *  - Consider the schema of pig.xml: In RDF and JSON-LD the class names of aLink and aProperty are used as predicate.
  */
 
 import { IRsp, rspOK, Msg, Rsp } from "../../../lib/messages";
@@ -71,6 +79,18 @@ export const PigItemType = {
     aRelationship: 'pig:aRelationship'
 } as const;
 export type PigItemTypeValue = typeof PigItemType[keyof typeof PigItemType];
+export enum XsDataType {
+    anyType = 'xs:anyType',
+    Boolean = 'xs:boolean',
+    Integer = 'xs:integer',
+    Double = 'xs:double',
+    String = 'xs:string',
+    AnyURI = 'xs:anyURI',
+    Date = 'xs:date',
+    DateTime = 'xs:dateTime',
+    Duration = 'xs:duration',
+    ComplexType = 'xs:complexType'
+}
 
 const PIG_CLASSES = new Set<PigItemTypeValue>([
     PigItemType.Property,
@@ -207,21 +227,9 @@ export class PigItem {
         return (Object.values(XsDataType) as string[]).includes(norm);
     }
 }
-export enum XsDataType {
-    anyType = 'xs:anyType',
-    Boolean = 'xs:boolean',
-    Integer = 'xs:integer',
-    Double = 'xs:double',
-    String = 'xs:string',
-    AnyURI = 'xs:anyURI',
-    Date = 'xs:date',
-    DateTime = 'xs:dateTime',
-    Duration = 'xs:duration',
-    ComplexType = 'xs:complexType'
-}
 export interface INamespace {
     tag: string; // e.g. a namespace tag, e.g. "pig:"
-    uri: string; // e.g. a namespace value, e.g. "https://product-information-graph.gfse.org/"
+    uri: string; // e.g. a namespace value, e.g. "https://product-information-graph.org/"
 }
 export interface ILanguageText {
     value: string;
@@ -427,22 +435,12 @@ abstract class Element extends Identifiable implements IElement {
     protected constructor(itm: IItem) {
         super(itm); // actual itemType set in concrete class
     }
-/*    protected validate(itm: IElement) {
-        // If eligibleProperty is not present, all properties are allowed;
-        // if present and empty, no properties are allowed.
-        // This is tested via schema at concrete class level.
-        //const rsp = validateIdStringArray(itm.eligibleProperty, 'eligibleProperty', { canBeUndefined: true, minCount: 0 });
-        //if (!rsp.ok) return rsp;
-        // ToDo: implement further validation logic
-        return super.validate(itm);
-    } */
     protected set(itm: IElement) {
         // validated in concrete subclass before calling this;
         // also lastStatus set in concrete subclass.
         super.set(itm);
         this.eligibleProperty = itm.eligibleProperty;
         this.icon = itm.icon;
-        // made chainable in concrete subclass
         return this;
     }
     protected get() {
@@ -515,7 +513,7 @@ abstract class AnElement extends Identifiable implements IAnElement {
         return _itm;
     }
     setJSONLD(itm: any) {
-        // ... for all subclasses:
+        // ... not superseded by any subclass, thus *not* protected.
         const _itm = this.fromJSONLD(itm) as any;
         return this.set(_itm);
     }
@@ -544,7 +542,7 @@ export interface IProperty extends IIdentifiable {
     eligibleValue?: IEligibleValue[]; // array of allowed values, datatype-dependent
     defaultValue?: string;   // in PIG, values of all datatypes are strings
     unit?: string;  // according to SI units
-    composedProperty?: TPigId[];  // must be URI of another Property, no cyclic references
+    composes?: TPigId[];  // must be URI of another Property, no cyclic references
 }
 export class Property extends Identifiable implements IProperty {
     datatype!: string;
@@ -557,7 +555,7 @@ export class Property extends Identifiable implements IProperty {
     eligibleValue?: IEligibleValue[]; 
     defaultValue?: string;
     unit?: string;
-    composedProperty?: TPigId[];
+    composes?: TPigId[];
     constructor() {
         super({itemType:PigItemType.Property});
     }
@@ -603,7 +601,7 @@ export class Property extends Identifiable implements IProperty {
             this.eligibleValue = itm.eligibleValue;
             this.defaultValue = itm.defaultValue;
             this.unit = itm.unit;
-            this.composedProperty = itm.composedProperty;
+            this.composes = itm.composes;
         }
         return this; // make chainable
     }
@@ -621,7 +619,7 @@ export class Property extends Identifiable implements IProperty {
             eligibleValue: this.eligibleValue,
             defaultValue: this.defaultValue,
             unit: this.unit,
-            composedProperty: this.composedProperty
+            composes: this.composes
         });
     }
     fromJSONLD(itm: any) {
@@ -833,12 +831,12 @@ export class Relationship extends Element implements IRelationship {
 export interface IAProperty extends IItem {
     value?: string;       // a. Literal value (string, number, boolean, date - all as string)
     idRef?: TPigId;       // b. Reference to eligibleValue (for enumerations)
-    aComposedProperty?: TPigId[];
+    composes?: TPigId[];  // for composed properties: nests other properties, as properties have no id
 }
 export class AProperty extends Item implements IAProperty {
     value?: string;
     idRef?: TPigId;
-    aComposedProperty?: TPigId[];
+    composes?: TPigId[];
     constructor() {
         super({ itemType: PigItemType.aProperty });
     }
@@ -854,7 +852,7 @@ export class AProperty extends Item implements IAProperty {
         this.lastStatus = this.validate(itm);
         if (this.lastStatus.ok) {
             super.set(itm);
-            this.aComposedProperty = itm.aComposedProperty;
+            this.composes = itm.composes;
             this.value = itm.value;
             this.idRef = itm.idRef;
         }
@@ -864,7 +862,7 @@ export class AProperty extends Item implements IAProperty {
         if (!this.lastStatus.ok) return undefined;
         return LIB.stripUndefined({
             ...super.get(),
-            aComposedProperty: this.aComposedProperty,
+            composes: this.composes,
             value: this.value,
             idRef: this.idRef
         });
@@ -1026,8 +1024,8 @@ export class AnEntity extends AnElement implements IAnEntity {
 }
 
 export interface IARelationship extends IAnElement {
-    hasSourceLink: IALink[];
-    hasTargetLink: IALink[];
+    hasSourceLink: IALink[];  // array must have exactly one element as checked by the JSON schema
+    hasTargetLink: IALink[];  // array must have exactly one element as checked by the JSON schema
 }
 export class ARelationship extends AnElement implements IARelationship {
     hasSourceLink!: ASourceLink[];
@@ -2111,7 +2109,7 @@ function collectConfigurablesFromJSONLD(obj: any, itype: PigItemTypeValue): IAPr
                             // itype == PigItemType.Property: idRef in case of an enumeration value(from eligibleValue),
                             // itype == PigItemType.Link: idRef is mandatory
                             idRef: item.id,
-                            aComposedProperty: item.aComposedProperty
+                            composes: item.composes
                         });
                     delete obj[key]; // remove processed property
                     }
@@ -2131,7 +2129,7 @@ function collectConfigurablesFromJSONLD(obj: any, itype: PigItemTypeValue): IAPr
                     // itype == PigItemType.Property: idRef in case of an enumeration value(from eligibleValue),
                     // itype == PigItemType.Link: idRef is mandatory
                     idRef: val.id,
-                    aComposedProperty: val.aComposedProperty
+                    composes: val.composes
                 });
                 delete obj[key]; // remove processed property
             }
@@ -2548,11 +2546,11 @@ function processConfigurableProperty(elem: ElementXML): JsonObject {
                 prop.idRef = childElement.textContent?.trim() as JsonValue;
             } else if (childTagName.endsWith('type')  || childTagName.endsWith('hasClass')) {
                 prop.hasClass = childElement.textContent?.trim() as JsonValue;
-            } else if (childTagName === 'aComposedProperty') {
-                if (!prop.aComposedProperty) {
-                    prop.aComposedProperty = [];
+            } else if (childTagName === 'composes') {
+                if (!prop.composes) {
+                    prop.composes = [];
                 }
-                (prop.aComposedProperty as string[]).push(childElement.textContent?.trim() || '');
+                (prop.composes as string[]).push(childElement.textContent?.trim() || '');
             }
         }
     }
@@ -2725,7 +2723,7 @@ function getXmlElementText(xmlElement: ElementXML): string {
  * Check if a property name represents a multi-language text field
  * These fields must always be arrays of ILanguageText objects according to pig-schemata.ts
  * 
- * Multi-language fields found in schemas:
+ * Multi-language fields found in schemata:
  * - Property: title, description, eligibleValue.title // the latter is handled through recursive iteration
  * - Link: title, description
  * - Entity: title, description
@@ -2739,7 +2737,7 @@ function isMultiLanguageText(propertyName: string): boolean {
     // Remove namespace prefix for checking
     const localName = RE.termWithNamespace.test(propertyName) ? propertyName.split(':')[1] : propertyName;
 
-    // All multi-language fields from PIG schemas that use LanguageText[]
+    // All multi-language fields from PIG schemata that use LanguageText[]
     const multiLangFields = new Set([
         // Common fields across all PIG classes and instances
         'title',           // dcterms:title - used in Property, Link, Entity, Relationship, AnEntity, ARelationship
diff --git a/src/utils/schemas/pig/ts/pig-package-constraints.ts b/src/common-code/schema/pig/ts/pig-package-constraints.ts
similarity index 99%
rename from src/utils/schemas/pig/ts/pig-package-constraints.ts
rename to src/common-code/schema/pig/ts/pig-package-constraints.ts
index 47e0cf9..75edd84 100644
--- a/src/utils/schemas/pig/ts/pig-package-constraints.ts
+++ b/src/common-code/schema/pig/ts/pig-package-constraints.ts
@@ -28,6 +28,8 @@
  *   ✅ - reference to eligible values (enumerations)
  * Phase 2 (important):
  *      namespace prefixes are defined in the context
+ *      subProperty is consistent with specialization hierarchy (following the restrictions of OWL2)
+ *      subClass is consistent with specialization hierarchy (following the restrictions of OWL2)
  *      eligible values as defined comply with the restrictions of their own Property class
  *      eligibleProperty references
  *      eligibleEndpoint references
diff --git a/src/utils/schemas/reqif/reqif-validator.ts.not-tested b/src/common-code/schema/reqif/reqif-validator.ts.not-tested
similarity index 100%
rename from src/utils/schemas/reqif/reqif-validator.ts.not-tested
rename to src/common-code/schema/reqif/reqif-validator.ts.not-tested
diff --git a/src/utils/schemas/reqif/reqif.sch.xml b/src/common-code/schema/reqif/reqif.sch.xml
similarity index 100%
rename from src/utils/schemas/reqif/reqif.sch.xml
rename to src/common-code/schema/reqif/reqif.sch.xml
diff --git a/src/components/Dashboards.vue b/src/components/Dashboards.vue
index 8af8231..714336e 100644
--- a/src/components/Dashboards.vue
+++ b/src/components/Dashboards.vue
@@ -140,7 +140,7 @@
 <script>
   import { Options, Vue } from 'vue-class-component';
 
-  export default class Dashboards extends Vue {}
+  export default class AppDashboards extends Vue {}
 </script>
 
 
diff --git a/src/components/Home.vue b/src/components/Home.vue
index 18c5d81..9565d2a 100644
--- a/src/components/Home.vue
+++ b/src/components/Home.vue
@@ -1,43 +1,115 @@
 <template>
-  <div class="Home Page">
-    <h1>{{ msg }}</h1>
-    <p>
-      Landing page for the CASCaRA App. Perform simple import and export functions for verification and validation of the PIG Metamodel using (near to) real-world examples.
-    </p>
-    <ul>
-        <li v-for="(component, name) in globalComponents" :key="name">
-            <component :is="name"/>
-        </li>
-    </ul>
-  </div>
-</template>
+    <div class="HomePage">
+        <h1>{{ msg }}</h1>
+        <p>
+            Perform simple import and export functions for verification and validation of the PIG Metamodel using (near to) real-world examples.
+        </p>
+
+        <!-- Mounted Plugins -->
+        <section>
+            <h3>Import Plugins</h3>
+            <ul>
+                <li v-for="(component, name) in importComponents" :key="name">
+                    {{ name }}
+                </li>
+            </ul>
+        <!--
+            <h3>Export Plugins</h3>
+            <ul>
+                <li v-for="(component, name) in exportComponents" :key="name">
+                    {{ name }}
+                </li>
+            </ul>  -->
+        </section>
+
+        <!-- Build Information Table -->
+        <section class="build-info">
+            <h3>Build Information</h3>
+            <dl class="info-table">
+                <dt>Version</dt>
+                <dd>{{ DEF.appVersion }}</dd>
 
+                <dt>Build Time</dt>
+                <dd>{{ DEF.buildTime }}</dd>
+
+                <dt>Branch</dt>
+                <dd>{{ DEF.gitBranch }}</dd>
+            </dl>
+        </section>
+    </div>
+</template>
 
 <script lang="ts">
-import { inject } from 'vue';
-import { Options, Vue } from 'vue-class-component';
+    import { inject } from 'vue';
+    import { Options, Vue } from 'vue-class-component';
+    import { DEF } from '@/common-code/lib/definitions';
 
-@Options({
-  props: {
-    msg: String
-  },
-  inject: ['globalComponents']
-})
+    @Options({
+        props: {
+            msg: String
+        },
+    //    inject: ['globalComponents'],
+        computed: {
+            DEF() { return DEF; },
+            importComponents() { return inject('importComponents', {}); },
+            exportComponents() { return inject('exportComponents', {}); }
+        }
+    })
 
-export default class Home extends Vue {}
+    export default class AppHome extends Vue { }
 </script>
 
 
 <style scoped>
-h3 {
-  margin: 40px 0 0;
-}
-ul {
-  list-style-type: none;
-  padding: 0;
-}
-li {
-  display: inline-block;
-  margin: 0 10px;
-}
+    h3 {
+        margin-top: 0.8rem;
+        margin-bottom: 0.4rem;
+        text-align: center;
+    }
+
+    p {
+        margin-bottom: 2rem;
+        line-height: 1.6;
+    }
+
+    ul {
+        list-style-type: none;
+        padding: 0;
+    }
+
+    li {
+        display: inline-block;
+        margin: 0 10px;
+    }
+
+    /* Build Information Styling */
+    .build-info {
+        margin: 2rem auto;
+        padding: 1.5rem;
+        background-color: #f8f9fa;
+        border-radius: 8px;
+        border: 1px solid #dee2e6;
+        max-width: 400px;
+    }
+
+    /* Definition List as Centered Table */
+    .info-table {
+        display: grid;
+        grid-template-columns: auto auto;
+        gap: 0.75rem 1.5rem;
+        margin: 0 auto;
+        justify-content: center;
+    }
+
+    .info-table dt {
+        font-weight: 400;
+        color: #495057;
+        text-align: right;
+    }
+
+    .info-table dd {
+        margin: 0;
+        color: #212529;
+        text-align: left;
+    }
 </style>
diff --git a/src/components/Interfaces.vue b/src/components/Interfaces.vue
index 227c974..2e57259 100644
--- a/src/components/Interfaces.vue
+++ b/src/components/Interfaces.vue
@@ -1,28 +1,24 @@
 <template>
     <div>
-        <v-sheet
-          border="dashed md"
-          color="surface-light"
-          height="200"
-          rounded="lg"
-          width="100%"
-        >
+        <v-sheet border="dashed md"
+                 color="surface-light"
+                 height="200"
+                 rounded="lg"
+                 width="100%">
             <ul>
-                <li v-for="(component, name) in exportComponents" :key="name">
-                    <component :is="name"/>
+                <li v-for="(component, name) in importComponents" :key="name">
+                    <component :is="component" />
                 </li>
             </ul>
         </v-sheet>
-        <v-sheet
-          border="dashed md"
-          color="surface-light"
-          height="200"
-          rounded="lg"
-          width="100%"
-        >
+        <v-sheet border="dashed md"
+                 color="surface-light"
+                 height="200"
+                 rounded="lg"
+                 width="100%">
             <ul>
-                <li v-for="(component, name) in importComponents" :key="name">
-                    <component :is="name"/>
+                <li v-for="(component, name) in exportComponents" :key="name">
+                    <component :is="component" />
                 </li>
             </ul>
         </v-sheet>
@@ -30,14 +26,15 @@
 </template>
 
 <script lang="ts">
-import { Options, Vue } from 'vue-class-component';
-import { inject } from 'vue';
+    import { Options, Vue } from 'vue-class-component';
+    import { inject } from 'vue';
 
-@Options({
-    inject: ['importComponents', 'exportComponents']
-})
+    @Options({
+        name: 'AppInterfaces',
+        inject: ['importComponents', 'exportComponents']
+    })
 
-export default class Interfaces extends Vue {}
+    export default class AppInterfaces extends Vue { }
 </script>
 
 <style scoped>
@@ -57,4 +54,4 @@ export default class Interfaces extends Vue {}
     .v-sheet {
       margin-top: 10px
     }
-</style>
\ No newline at end of file
+</style>
diff --git a/src/components/Navigation.vue b/src/components/Navigation.vue
index 87b3fe8..9bbdf44 100644
--- a/src/components/Navigation.vue
+++ b/src/components/Navigation.vue
@@ -1,41 +1,48 @@
 <template>
     <div>
-    <v-app-bar theme="dark">
-        <v-app-bar-nav-icon @click="drawer = !drawer"></v-app-bar-nav-icon>
-        <v-app-bar-title><h2>{{msg}}</h2></v-app-bar-title>
-    </v-app-bar>
+        <v-app-bar class="gradient-banner">
+            <v-app-bar-nav-icon @click="drawer = !drawer"></v-app-bar-nav-icon>
+            <v-app-bar-title>{{msg}}</v-app-bar-title>
+        </v-app-bar>
 
-    <v-navigation-drawer v-model="drawer" color="secondary">
-      <v-list nav>
-        <v-list-item border="md" href="/">
-            <v-list-item-title>Home</v-list-item-title>
-        </v-list-item>
-        <v-list-item border="md" href="/dashboards">
-            <v-list-item-title>Dashboard</v-list-item-title>
-        </v-list-item>
-        <v-list-item border="md" href="/interfaces">
-            <v-list-item-title>Interfaces</v-list-item-title>
-        </v-list-item>
-      </v-list>
-    </v-navigation-drawer>
+        <v-navigation-drawer v-model="drawer" color="surface-light"> <!-- or grey-lighten-3 -->
+            <v-list nav>
+                <v-list-item border="md" href="/">
+                    <h3>Home</h3>
+                </v-list-item>
+                <v-list-item border="md" href="/dashboards">
+                    <h3>Dashboard</h3>
+                </v-list-item>
+                <v-list-item border="md" href="/interfaces">
+                    <h3>Interfaces</h3>
+                </v-list-item>
+            </v-list>
+        </v-navigation-drawer>
     </div>
 </template>
 
-
 <script lang="ts">
-import { Options, Vue } from 'vue-class-component';
+    import { Options, Vue } from 'vue-class-component';
 
-@Options({
-  props: {
-    msg: String
-  },
-  data() {
-    return {drawer: false}
-  }
-})
+    @Options({
+        name: 'AppNav',
+        props: {
+            msg: String
+        },
+        data() {
+            return { drawer: false }
+        }
+    })
 
-export default class Home extends Vue {}
+    export default class AppNav extends Vue { }
 </script>
 
-
-<style scoped></style>
+<style scoped>
+    .gradient-banner {
+        background: linear-gradient(135deg, #ad0505, #ff6d05) !important;
+        color: white !important;
+    }
+    .v-app-bar-title h2 {
+        color: white !important;
+    }
+</style>
diff --git a/src/components/Viewing.vue b/src/components/Viewing.vue
index 49f81c7..26a4bee 100644
--- a/src/components/Viewing.vue
+++ b/src/components/Viewing.vue
@@ -40,44 +40,45 @@
 
 
 <script lang="ts">
-import { Vue, Options} from 'vue-class-component'
-import { useHtmlStore } from '@/stores/cacheStore'
+    import { Vue, Options } from 'vue-class-component'
+    import { useHtmlStore } from '@/stores/cacheStore'
 
-@Options({
-  data() {
-    return {
-      selectedIndex: null as number | null
-    }
-  },
+    @Options({
+      name: 'AppView',
+      data() {
+                return {
+                    selectedIndex: null as number | null
+                }
+            },
 
-  computed: {
-    htmlArray(): string[] {
-      const store = useHtmlStore()
-      const value = store.htmlArray
-      console.log('value ' + value)
+        computed: {
+            htmlArray(): string[] {
+                const store = useHtmlStore()
+                const value = store.htmlArray
+                //LOG.debug('value ' + value)
 
-      if (!value) return []
+                if (!value) return []
 
-      return Array.isArray(value) ? value : [value]
-    },
+                return Array.isArray(value) ? value : [value]
+            },
 
-    selectedHtml(): string | null {
-      if (this.selectedIndex === null) return null
+            selectedHtml(): string | null {
+                if (this.selectedIndex === null) return null
 
-      return this.htmlArray[this.selectedIndex] ?? null
-    }
-  },
+                return this.htmlArray[this.selectedIndex] ?? null
+            }
+        },
 
-  methods: {
-    selectItem(index: number) {
-      this.selectedIndex = index
-    }
-  }
-})
+        methods: {
+            selectItem(index: number) {
+                this.selectedIndex = index
+            }
+        }
+    })
 
-export default class Viewing extends Vue {}
+    export default class AppView extends Vue { }
 </script>
 
 
 <style scoped>
-</style>
\ No newline at end of file
+</style>
diff --git a/src/main.js b/src/main.js
deleted file mode 100644
index 79a2bd7..0000000
--- a/src/main.js
+++ /dev/null
@@ -1,4 +0,0 @@
-import { createApp } from 'vue';
-import App from './App.vue';
-createApp(App).mount('#app');
-//# sourceMappingURL=main.js.map
\ No newline at end of file
diff --git a/src/main.ts b/src/main.ts
index 9a18199..3965a0c 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -2,6 +2,7 @@ import { createApp } from 'vue'
 import { createPinia } from 'pinia'
 import App from './App.vue'
 import ajvPlugin from './plugins/ajv';
+import { LOG } from './common-code/lib/helpers';
 
 import 'vuetify/styles'
 import { createVuetify } from 'vuetify'
@@ -9,11 +10,42 @@ import * as components from 'vuetify/components'
 import * as directives from 'vuetify/directives'
 import '@mdi/font/css/materialdesignicons.css'
 import router from './router';
+import '@/styles/main.css';
 
 const vuetify = createVuetify({
     components,
     directives,
-  })
+    theme: {
+        defaultTheme: 'cas',
+        themes: {
+            cas: {
+                colors: {
+                    primary: '#c83b05', // 75%
+                    secondary: '#e25505', // 50%
+
+                    // cas-100: '#ad0505',
+                    // cas-75: '#c83b05',
+                    // cas-50: '#e25505',
+                    // cas-25: '#fc7705',
+                    // cas-0: '#ff6d05',
+
+                    // vue standard colors:
+                    // primary: '#1976d2',
+                    // secondary: '#424242',
+                    success: '#4caf50',
+                    info: '#2196f3',
+                    warning: '#fb8c00',
+                    error: '#ff5252',
+                    background: '#f5f5f5',
+                    surface: '#ffffff'
+                },
+                variables: {
+                    'font-family': "'Roboto', Arial, sans-serif"
+                }
+            }
+        }
+    }
+});
 
 const app = createApp(App);
 
@@ -35,9 +67,9 @@ pluginFiles.keys().forEach((filePath: string) => {
 const exportComponents = Object.fromEntries(Object.entries(app._context.components).filter(([key, value]) => key.includes("Export")));
 const importComponents = Object.fromEntries(Object.entries(app._context.components).filter(([key, value]) => key.includes("Import")));
 
-console.log(exportComponents);
-app.provide('exportComponents', exportComponents);
-console.log(importComponents);
+LOG.info("Mounted import components:", importComponents);
 app.provide('importComponents', importComponents);
+LOG.info("Mounted export components:", exportComponents);
+app.provide('exportComponents', exportComponents);
 
 app.mount('#app');
diff --git a/src/plugins/Imports/JsonImportPlugin.vue b/src/plugins/Imports/JsonImportPlugin.vue
deleted file mode 100644
index ea0ba0c..0000000
--- a/src/plugins/Imports/JsonImportPlugin.vue
+++ /dev/null
@@ -1,69 +0,0 @@
-<template>
-    <v-btn color='primary' @click='dialog = true'>Import JSON-LD</v-btn>
-    <v-dialog v-model='dialog'>
-        <v-card class='w-50'>
-            <v-card-title>Select Import Files</v-card-title>
-            <v-card-actions>
-                <v-file-input
-                    v-model='selectedFiles'
-                    accept='.json,.jsonld,application/ld+json'
-                    label='JSON-LD Input'
-                    prepend-icon='mdi-folder-open'
-                    multiple
-                ></v-file-input>
-                <v-btn color='red' @click='dialog = false'>Close</v-btn>
-                <v-btn color='blue' @click='onClick'>Submit</v-btn>
-            </v-card-actions>
-        </v-card>
-    </v-dialog>
-</template>
-
-<script lang="ts">
-import { Options, Vue } from 'vue-class-component';
-import { importJSONLD } from '../../utils/import/jsonld/import-package-jsonld';
-import { TPigItem, APackage, stringHTML } from '../../utils/schemas/pig/ts/pig-metaclasses';
-import { useHtmlStore } from '@/stores/cacheStore' 
-
-@Options({
-  data() {
-    return {
-        dialog: false,
-        selectedFiles: []
-    };
-  },
-  methods: {
-    async onClick() {
-        const store = useHtmlStore()
-
-        const htmlArray = await this.submitFiles()
-        console.log(htmlArray)
-        store.htmlArray = htmlArray
-
-        await this.$router.push({
-            name: "Viewing"
-        })
-    },
-    async submitFiles() {
-        for (const file of this.selectedFiles) {
-            // extract HTML of object
-            const translatorResponse = await importJSONLD(file);
-            if (translatorResponse.ok) {
-                // handle successful import, e.g., store the PIG items and update the UI
-                const allItems = translatorResponse.response as TPigItem[];
-                const thePackage = allItems[0] as APackage;
-                
-                // TODO: this will only return the first file, need to update to return list of all HTML
-                const htmlArray = thePackage.getHTML() as stringHTML[]
-                return htmlArray
-            } else {
-                // handle import error, e.g., log/show an error message
-            }
-        }
-    }
-  },
-})
-
-export default class JsonImportComponent extends Vue {}
-</script>
-
-<style scoped></style>
diff --git a/src/plugins/Imports/ReqifImportPlugin.vue b/src/plugins/Imports/ReqifImportPlugin.vue
deleted file mode 100644
index 4db5804..0000000
--- a/src/plugins/Imports/ReqifImportPlugin.vue
+++ /dev/null
@@ -1,58 +0,0 @@
-<template>
-    <v-btn color='primary' @click='dialog = true'>Import ReqIF</v-btn>
-    <v-dialog v-model='dialog'>
-        <v-card class='w-50'>
-            <v-card-title>Select Import Files</v-card-title>
-            <v-card-actions>
-                <v-file-input
-                    v-model='selectedFiles'
-                    accept='.reqif'
-                    label='ReqIF Input'
-                    prepend-icon='mdi-folder-open'
-                    multiple
-                ></v-file-input>
-                <v-btn color='red' @click='dialog = false'>Close</v-btn>
-                <v-btn color='blue' @click='submitFiles'>Submit</v-btn>
-            </v-card-actions>
-        </v-card>
-    </v-dialog>
-</template>
-
-<script lang="ts">
-    import { Options, Vue } from 'vue-class-component';
-    import { importReqif } from '../../utils/import/ReqIF/import-reqif';
-    import { PIN } from '../../utils/lib/platform-independence';
-
-    @Options({
-        data() {
-            return {
-                dialog: false,
-                selectedFiles: []
-            };
-        },
-        methods: {
-            async submitFiles() {
-                for (const file of this.selectedFiles) {
-                    const readResponse = await PIN.readFileAsText(file)
-                    const rspContent = readResponse.response
-                    const importResponse = await importReqif(rspContent.response, file)
-                    if (importResponse.ok) {
-                        // handle successful import, e.g., store the PIG items and update the UI
-                        const importPackage = importResponse.response
-                        console.log(typeof importPackage)
-                    } else {
-                        // handle import error, e.g., log/show an error message
-                    }
-                }
-
-                // reset variables
-                this.dialog = false;
-                this.selectedFiles = [];
-            }
-        }
-    })
-
-    export default class ReqifImportComponent extends Vue { }
-</script>
-
-<style scoped></style>
diff --git a/src/plugins/Exports/JsonExportPlugin.vue b/src/plugins/export/jsonld/export-jsonld.vue
similarity index 100%
rename from src/plugins/Exports/JsonExportPlugin.vue
rename to src/plugins/export/jsonld/export-jsonld.vue
diff --git a/src/plugins/Exports/json-export-plugin.ts b/src/plugins/export/jsonld/mount-export-jsonld.ts
similarity index 77%
rename from src/plugins/Exports/json-export-plugin.ts
rename to src/plugins/export/jsonld/mount-export-jsonld.ts
index 86ca2e5..bf24dbf 100644
--- a/src/plugins/Exports/json-export-plugin.ts
+++ b/src/plugins/export/jsonld/mount-export-jsonld.ts
@@ -1,5 +1,5 @@
 import { App, Plugin } from 'vue';
-import JsonExportComponent from "./JsonExportPlugin.vue";
+import JsonExportComponent from "./export-jsonld.vue";
 
 const jsonExportPlugin: Plugin = {
     install(app: App) {
@@ -12,7 +12,7 @@ const jsonExportPlugin: Plugin = {
         // };
 
         // global component
-        app.component('JsonExportComponent', JsonExportComponent);
+        app.component('Export-JSONLD', JsonExportComponent);
     }
 }
 
diff --git a/src/plugins/Exports/RdfExportPlugin.vue b/src/plugins/export/ttl/export-ttl.vue
similarity index 100%
rename from src/plugins/Exports/RdfExportPlugin.vue
rename to src/plugins/export/ttl/export-ttl.vue
diff --git a/src/plugins/Exports/rdf-export-plugin.ts b/src/plugins/export/ttl/mount-export-ttl.ts
similarity index 78%
rename from src/plugins/Exports/rdf-export-plugin.ts
rename to src/plugins/export/ttl/mount-export-ttl.ts
index 1fb2aa7..a99aacb 100644
--- a/src/plugins/Exports/rdf-export-plugin.ts
+++ b/src/plugins/export/ttl/mount-export-ttl.ts
@@ -1,5 +1,5 @@
 import { App, Plugin } from 'vue';
-import RdfExportComponent from "./RdfExportPlugin.vue";
+import RdfExportComponent from "./export-ttl.vue";
 
 const rdfExportPlugin: Plugin = {
     install(app: App, options?) {
@@ -12,7 +12,7 @@ const rdfExportPlugin: Plugin = {
         // };
 
         // global component
-        app.component('RdfExportComponent', RdfExportComponent);
+        app.component('Export-TTL', RdfExportComponent);
     }
 }
 
diff --git a/src/plugins/import/jsonld/import-jsonld.vue b/src/plugins/import/jsonld/import-jsonld.vue
new file mode 100644
index 0000000..fa327e4
--- /dev/null
+++ b/src/plugins/import/jsonld/import-jsonld.vue
@@ -0,0 +1,210 @@
+<template>
+    <v-btn color='primary' @click='dialog = true'>Import JSON-LD</v-btn>
+    <v-dialog v-model='dialog' max-width='600'>
+        <v-card>
+            <v-card-title>Select JSON-LD Files</v-card-title>
+
+            <v-card-text>
+                <v-file-input v-model='selectedFiles'
+                              accept='.jsonld,.json'
+                              label='JSON-LD Input'
+                              prepend-icon='mdi-folder-open'
+                              multiple
+                              :loading='isLoading'
+                              :disabled='isLoading'
+                              hint='Select one or more JSON-LD files to import'
+                              persistent-hint></v-file-input>
+
+                <!-- Error Display -->
+                <v-alert v-if='errorMessages.length > 0'
+                         type='error'
+                         dismissible
+                         class='mt-4'
+                         @click:close='errorMessages = []'>
+                    <div v-for='(error, index) in errorMessages' :key='index'>
+                        {{ error }}
+                    </div>
+                </v-alert>
+
+                <!-- Success Display -->
+                <v-alert v-if='successMessage'
+                         type='success'
+                         dismissible
+                         class='mt-4'
+                         @click:close='successMessage = ""'>
+                    {{ successMessage }}
+                </v-alert>
+
+                <!-- Progress Indicator -->
+                <v-progress-linear v-if='isLoading'
+                                   indeterminate
+                                   color='primary'
+                                   class='mt-4'></v-progress-linear>
+            </v-card-text>
+
+            <v-card-actions>
+                <v-spacer></v-spacer>
+                <v-btn color='grey' @click='onCancel' :disabled='isLoading'>
+                    Cancel
+                </v-btn>
+                <v-btn color='primary'
+                       @click='onSubmit'
+                       :disabled='!selectedFiles.length || isLoading'
+                       :loading='isLoading'>
+                    Import
+                </v-btn>
+            </v-card-actions>
+        </v-card>
+    </v-dialog>
+</template>
+
+<script lang="ts">
+    import { Options, Vue } from 'vue-class-component';
+    import { JsonldImporter } from '@/common-code/import/jsonld/import-jsonld';
+    import { TPigItem, APackage, stringHTML } from '@/common-code/schema/pig/ts/pig-metaclasses';
+    import { useHtmlStore } from '@/stores/cacheStore';
+    import { IRsp } from '@/common-code/lib/messages';
+
+    @Options({
+        data() {
+            return {
+                dialog: false,
+                selectedFiles: [] as File[],
+                isLoading: false,
+                errorMessages: [] as string[],
+                successMessage: ''
+            };
+        },
+        methods: {
+            /**
+             * Handle submit button click
+             */
+            async onSubmit() {
+                if (!this.selectedFiles.length) {
+                    this.errorMessages = ['Please select at least one file'];
+                    return;
+                }
+
+                this.isLoading = true;
+                this.errorMessages = [];
+                this.successMessage = '';
+
+                try {
+                    // Import all files and collect results
+                    const results = await this.importAllFiles();
+
+                    // Separate successful and failed imports
+                    // ToDo: results with 691 status (partial success) should be handled separately, but for now we treat them as failures:
+                    const successful = results.filter((r: IRsp<unknown>) => r.ok);
+                    const failed = results.filter((r: IRsp<unknown>) => !r.ok);
+
+                    // Collect all HTML arrays from successful imports
+                    const allHtmlArrays = successful.flatMap((r: IRsp<unknown>) => {
+                        const allItems = r.response as TPigItem[];
+                        const thePackage = allItems[0] as APackage;
+                        return thePackage.getHTML() as stringHTML[];
+                    });
+
+                    if (allHtmlArrays.length > 0) {
+                        // Store in Pinia store
+                        const store = useHtmlStore();
+                        store.htmlArray = allHtmlArrays;
+
+                        // Show success message
+                        this.successMessage = `Imported ${successful.length} of ${results.length} file(s)`;
+
+                        // Log failed imports
+                        if (failed.length > 0) {
+                            this.errorMessages = failed.map((r: IRsp<unknown>) =>
+                                `${this.getFilenameFromResponse(r)}: ${r.statusText || 'Unknown error'}`
+                            );
+                            console.error('Failed imports:', failed);
+                        }
+
+                        // Navigate to viewing page after short delay
+                        setTimeout(async () => {
+                            await this.$router.push({ name: 'Viewing' });
+                            this.dialog = false;
+                            this.onCancel();
+                        }, 1500);
+                    } else {
+                        this.errorMessages = ['No files were successfully imported'];
+                    }
+
+                } catch (error: any) {
+                    this.errorMessages = [`Import failed: ${error?.message || String(error)}`];
+                    console.error('Import error:', error);
+                } finally {
+                    this.isLoading = false;
+                }
+            },
+
+            /**
+             * Import all selected files
+             * Returns array of IRsp results (one per file)
+             */
+            async importAllFiles(): Promise<IRsp<unknown>[]> {
+                const results: IRsp<unknown>[] = [];
+
+                for (const file of this.selectedFiles) {
+                    try {
+                        const rsp = await JsonldImporter.import(file);
+                        results.push(rsp);
+                    } catch (error: any) {
+                        // Convert exception to IRsp format
+                        results.push({
+                            ok: false,
+                            status: 500,
+                            statusText: `${file.name}: ${error?.message || String(error)}`,
+                            responseType: 'json'
+                        });
+                    }
+                }
+
+                return results;
+            },
+
+            /**
+             * Extract filename from IRsp response for error messages
+             */
+            getFilenameFromResponse(rsp: IRsp<unknown>): string {
+                // Try to extract filename from statusText
+                const match = rsp.statusText?.match(/^([^:]+):/);
+                return match ? match[1] : 'Unknown file';
+            },
+
+            /**
+             * Handle cancel button click
+             */
+            onCancel() {
+                this.dialog = false;
+                this.selectedFiles = [];
+                this.errorMessages = [];
+                this.successMessage = '';
+            }
+        }
+    })
+
+    export default class JsonImportComponent extends Vue {
+        dialog!: boolean;
+        selectedFiles!: File[];
+        isLoading!: boolean;
+        errorMessages!: string[];
+        successMessage!: string;
+    }
+</script>
+
+<style scoped>
+    .v-card {
+        padding: 1rem;
+    }
+
+    .v-card-title {
+        font-size: 1.5rem;
+        font-weight: 500;
+    }
+
+    .v-alert {
+        white-space: pre-line;
+    }
+</style>
diff --git a/src/plugins/Imports/json-import-plugin.ts b/src/plugins/import/jsonld/mount-import-jsonld.ts
similarity index 77%
rename from src/plugins/Imports/json-import-plugin.ts
rename to src/plugins/import/jsonld/mount-import-jsonld.ts
index 7147a03..47d5825 100644
--- a/src/plugins/Imports/json-import-plugin.ts
+++ b/src/plugins/import/jsonld/mount-import-jsonld.ts
@@ -1,5 +1,5 @@
 import { App, Plugin } from 'vue';
-import JsonImportComponent from "./JsonImportPlugin.vue";
+import JsonImportComponent from "./import-jsonld.vue";
 
 const jsonImportPlugin: Plugin = {
     install(app: App) {
@@ -12,7 +12,7 @@ const jsonImportPlugin: Plugin = {
         // };
 
         // global component
-        app.component('JsonImportComponent', JsonImportComponent);
+        app.component('Import-JSONLD', JsonImportComponent);
     }
 }
 
diff --git a/src/plugins/import/reqif/import-reqif.vue b/src/plugins/import/reqif/import-reqif.vue
new file mode 100644
index 0000000..0a0fcab
--- /dev/null
+++ b/src/plugins/import/reqif/import-reqif.vue
@@ -0,0 +1,207 @@
+<template>
+    <v-btn color='primary' @click='dialog = true'>Import ReqIF</v-btn>
+    <v-dialog v-model='dialog' max-width='600'>
+        <v-card>
+            <v-card-title>Select ReqIF Files</v-card-title>
+
+            <v-card-text>
+                <v-file-input v-model='selectedFiles'
+                              accept='.reqif'
+                              label='ReqIF Input'
+                              prepend-icon='mdi-folder-open'
+                              multiple
+                              :loading='isLoading'
+                              :disabled='isLoading'
+                              hint='Select one or more ReqIF files to import'
+                              persistent-hint></v-file-input>
+
+                <!-- Error Display -->
+                <v-alert v-if='errorMessages.length > 0'
+                         type='error'
+                         dismissible
+                         class='mt-4'
+                         @click:close='errorMessages = []'>
+                    <div v-for='(error, index) in errorMessages' :key='index'>
+                        {{ error }}
+                    </div>
+                </v-alert>
+
+                <!-- Success Display -->
+                <v-alert v-if='successMessage'
+                         type='success'
+                         dismissible
+                         class='mt-4'
+                         @click:close='successMessage = ""'>
+                    {{ successMessage }}
+                </v-alert>
+
+                <!-- Progress Indicator -->
+                <v-progress-linear v-if='isLoading'
+                                   indeterminate
+                                   color='primary'
+                                   class='mt-4'></v-progress-linear>
+            </v-card-text>
+
+            <v-card-actions>
+                <v-spacer></v-spacer>
+                <v-btn color='grey' @click='onCancel' :disabled='isLoading'>
+                    Cancel
+                </v-btn>
+                <v-btn color='primary'
+                       @click='onSubmit'
+                       :disabled='!selectedFiles.length || isLoading'
+                       :loading='isLoading'>
+                    Import
+                </v-btn>
+            </v-card-actions>
+        </v-card>
+    </v-dialog>
+</template>
+
+<script lang="ts">
+    import { Options, Vue } from 'vue-class-component';
+    import { ReqifImporter } from '@/common-code/import/reqif/import-reqif';
+    import { TPigItem, APackage, stringHTML } from '@/common-code/schema/pig/ts/pig-metaclasses';
+    import { useHtmlStore } from '@/stores/cacheStore';
+    import { Msg, IRsp } from '@/common-code/lib/messages';
+
+    @Options({
+        data() {
+            return {
+                dialog: false,
+                selectedFiles: [] as File[],
+                isLoading: false,
+                errorMessages: [] as string[],
+                successMessage: ''
+            };
+        },
+        methods: {
+            /**
+             * Handle submit button click
+             */
+            async onSubmit() {
+                if (!this.selectedFiles.length) {
+                    this.errorMessages = ['Please select at least one file'];
+                    return;
+                }
+
+                this.isLoading = true;
+                this.errorMessages = [];
+                this.successMessage = '';
+
+                try {
+                    // Import all files and collect results
+                    const results = await this.importAllFiles();
+
+                    // Separate successful and failed imports
+                    // ✅ Type annotation hinzugefügt
+                    const successful = results.filter((r: IRsp<unknown>) => r.ok);
+                    const failed = results.filter((r: IRsp<unknown>) => !r.ok);
+
+                    // Collect all HTML arrays from successful imports
+                    // ✅ Type annotation hinzugefügt
+                    const allHtmlArrays = successful.flatMap((r: IRsp<unknown>) => {
+                        const allItems = r.response as TPigItem[];
+                        const thePackage = allItems[0] as APackage;
+                        return thePackage.getHTML() as stringHTML[];
+                    });
+
+                    if (allHtmlArrays.length > 0) {
+                        // Store in Pinia store
+                        const store = useHtmlStore();
+                        store.htmlArray = allHtmlArrays;
+
+                        // Show success message
+                        this.successMessage = `Successfully imported ${successful.length} of ${results.length} file(s)`;
+
+                        // Log failed imports
+                        if (failed.length > 0) {
+                            // ✅ Type annotation hinzugefügt
+                            this.errorMessages = failed.map((r: IRsp<unknown>) =>
+                                `${this.getFilenameFromResponse(r)}: ${r.statusText || 'Unknown error'}`
+                            );
+                            console.error('Failed imports:', failed);
+                        }
+
+                        // Navigate to viewing page after short delay
+                        setTimeout(async () => {
+                            await this.$router.push({ name: 'Viewing' });
+                            this.dialog = false;
+                            this.onCancel();
+                        }, 1500);
+                    } else {
+                        this.errorMessages = ['No files were successfully imported'];
+                    }
+
+                } catch (error: any) {
+                    this.errorMessages = [`Import failed: ${error?.message || String(error)}`];
+                    console.error('Import error:', error);
+                } finally {
+                    this.isLoading = false;
+                }
+            },
+
+            /**
+             * Import all selected files
+             * Returns array of IRsp results (one per file)
+             */
+            async importAllFiles(): Promise<IRsp<unknown>[]> {
+                const results: IRsp<unknown>[] = [];
+
+                for (const file of this.selectedFiles) {
+                    try {
+                        const rsp = await ReqifImporter.import(file);
+                        results.push(rsp);
+                    } catch (error: any) {
+                        // Convert exception to IRsp format
+                        results.push(Msg.create(600, `${file.name}: ${error?.message || String(error)}`));
+                    }
+                }
+
+                return results;
+            },
+
+            /**
+             * Extract filename from IRsp response for error messages
+             */
+            getFilenameFromResponse(rsp: IRsp<unknown>): string {
+                // Try to extract filename from statusText
+                const match = rsp.statusText?.match(/^([^:]+):/);
+                return match ? match[1] : 'Unknown file';
+            },
+
+            /**
+             * Handle cancel button click
+             */
+            onCancel() {
+                this.dialog = false;
+                this.selectedFiles = [];
+                this.errorMessages = [];
+                this.successMessage = '';
+            }
+        }
+    })
+
+    export default class ReqifImportComponent extends Vue {
+        dialog!: boolean;
+        selectedFiles!: File[];
+        isLoading!: boolean;
+        errorMessages!: string[];
+        successMessage!: string;
+    }
+</script>
+
+<style scoped>
+    .v-card {
+        padding: 1rem;
+    }
+
+    .v-card-title {
+        font-size: 1.5rem;
+        font-weight: 500;
+    }
+
+    .v-alert {
+        white-space: pre-line;
+    }
+</style>
diff --git a/src/plugins/Imports/reqif-import-plugin.ts b/src/plugins/import/reqif/mount-import-reqif.ts
similarity index 76%
rename from src/plugins/Imports/reqif-import-plugin.ts
rename to src/plugins/import/reqif/mount-import-reqif.ts
index 5383e30..1189cd1 100644
--- a/src/plugins/Imports/reqif-import-plugin.ts
+++ b/src/plugins/import/reqif/mount-import-reqif.ts
@@ -1,5 +1,5 @@
 import { App, Plugin } from 'vue';
-import ReqifImportComponent from "./ReqifImportPlugin.vue";
+import ReqifImportComponent from "./import-reqif.vue";
 
 const reqifImportPlugin: Plugin = {
     install(app: App) {
@@ -12,7 +12,7 @@ const reqifImportPlugin: Plugin = {
         // };
 
         // global component
-        app.component('ReqifImportComponent', ReqifImportComponent);
+        app.component('Import-ReqIF', ReqifImportComponent);
     }
 }
 
diff --git a/src/plugins/import/xml/import-xml.vue b/src/plugins/import/xml/import-xml.vue
new file mode 100644
index 0000000..19fab57
--- /dev/null
+++ b/src/plugins/import/xml/import-xml.vue
@@ -0,0 +1,206 @@
+<template>
+    <v-btn color='primary' @click='dialog = true'>Import XML</v-btn>
+    <v-dialog v-model='dialog' max-width='600'>
+        <v-card>
+            <v-card-title>Select XML Files</v-card-title>
+
+            <v-card-text>
+                <v-file-input v-model='selectedFiles'
+                              accept='.xml'
+                              label='XML Input'
+                              prepend-icon='mdi-folder-open'
+                              multiple
+                              :loading='isLoading'
+                              :disabled='isLoading'
+                              hint='Select one or more XML files to import'
+                              persistent-hint></v-file-input>
+
+                <!-- Error Display -->
+                <v-alert v-if='errorMessages.length > 0'
+                         type='error'
+                         dismissible
+                         class='mt-4'
+                         @click:close='errorMessages = []'>
+                    <div v-for='(error, index) in errorMessages' :key='index'>
+                        {{ error }}
+                    </div>
+                </v-alert>
+
+                <!-- Success Display -->
+                <v-alert v-if='successMessage'
+                         type='success'
+                         dismissible
+                         class='mt-4'
+                         @click:close='successMessage = ""'>
+                    {{ successMessage }}
+                </v-alert>
+
+                <!-- Progress Indicator -->
+                <v-progress-linear v-if='isLoading'
+                                   indeterminate
+                                   color='primary'
+                                   class='mt-4'></v-progress-linear>
+            </v-card-text>
+
+            <v-card-actions>
+                <v-spacer></v-spacer>
+                <v-btn color='grey' @click='onCancel' :disabled='isLoading'>
+                    Cancel
+                </v-btn>
+                <v-btn color='primary'
+                       @click='onSubmit'
+                       :disabled='!selectedFiles.length || isLoading'
+                       :loading='isLoading'>
+                    Import
+                </v-btn>
+            </v-card-actions>
+        </v-card>
+    </v-dialog>
+</template>
+
+<script lang="ts">
+    import { Options, Vue } from 'vue-class-component';
+    import { XmlImporter } from '@/common-code/import/xml/import-xml';
+    import { TPigItem, APackage, stringHTML } from '@/common-code/schema/pig/ts/pig-metaclasses';
+    import { useHtmlStore } from '@/stores/cacheStore';
+    import { Msg, IRsp } from '@/common-code/lib/messages';
+
+    @Options({
+        data() {
+            return {
+                dialog: false,
+                selectedFiles: [] as File[],
+                isLoading: false,
+                errorMessages: [] as string[],
+                successMessage: ''
+            };
+        },
+        methods: {
+            /**
+             * Handle submit button click
+             */
+            async onSubmit() {
+                if (!this.selectedFiles.length) {
+                    this.errorMessages = ['Please select at least one file'];
+                    return;
+                }
+
+                this.isLoading = true;
+                this.errorMessages = [];
+                this.successMessage = '';
+
+                try {
+                    // Import all files and collect results
+                    const results = await this.importAllFiles();
+
+                    // Separate successful and failed imports
+                    // ToDo: results with 691 status (partial success) should be handled separately, but for now we treat them as failures:
+                    const successful = results.filter((r: IRsp<unknown>) => r.ok);
+                    const failed = results.filter((r: IRsp<unknown>) => !r.ok);
+
+                    // Collect all HTML arrays from successful imports
+                    const allHtmlArrays = successful.flatMap((r: IRsp<unknown>) => {
+                        const allItems = r.response as TPigItem[];
+                        const thePackage = allItems[0] as APackage;
+                        return thePackage.getHTML() as stringHTML[];
+                    });
+
+                    if (allHtmlArrays.length > 0) {
+                        // Store in Pinia store
+                        const store = useHtmlStore();
+                        store.htmlArray = allHtmlArrays;
+
+                        // Show success message
+                        this.successMessage = `Successfully imported ${successful.length} of ${results.length} file(s)`;
+
+                        // Log failed imports
+                        if (failed.length > 0) {
+                            // ✅ Type annotation hinzugefügt
+                            this.errorMessages = failed.map((r: IRsp<unknown>) =>
+                                `${this.getFilenameFromResponse(r)}: ${r.statusText || 'Unknown error'}`
+                            );
+                            console.error('Failed imports:', failed);
+                        }
+
+                        // Navigate to viewing page after short delay
+                        setTimeout(async () => {
+                            await this.$router.push({ name: 'Viewing' });
+                            this.dialog = false;
+                            this.onCancel();
+                        }, 1500);
+                    } else {
+                        this.errorMessages = ['No files were successfully imported'];
+                    }
+
+                } catch (error: any) {
+                    this.errorMessages = [`Import failed: ${error?.message || String(error)}`];
+                    console.error('Import error:', error);
+                } finally {
+                    this.isLoading = false;
+                }
+            },
+
+            /**
+             * Import all selected files
+             * Returns array of IRsp results (one per file)
+             */
+            async importAllFiles(): Promise<IRsp<unknown>[]> {
+                const results: IRsp<unknown>[] = [];
+
+                for (const file of this.selectedFiles) {
+                    try {
+                        const rsp = await XmlImporter.import(file);
+                        results.push(rsp);
+                    } catch (error: any) {
+                        // Convert exception to IRsp format
+                        results.push(Msg.create(600, `${file.name}: ${error?.message || String(error)}`));
+                    }
+                }
+
+                return results;
+            },
+
+            /**
+             * Extract filename from IRsp response for error messages
+             */
+            getFilenameFromResponse(rsp: IRsp<unknown>): string {
+                // Try to extract filename from statusText
+                const match = rsp.statusText?.match(/^([^:]+):/);
+                return match ? match[1] : 'Unknown file';
+            },
+
+            /**
+             * Handle cancel button click
+             */
+            onCancel() {
+                this.dialog = false;
+                this.selectedFiles = [];
+                this.errorMessages = [];
+                this.successMessage = '';
+            }
+        }
+    })
+
+    export default class XmlImportComponent extends Vue {
+        dialog!: boolean;
+        selectedFiles!: File[];
+        isLoading!: boolean;
+        errorMessages!: string[];
+        successMessage!: string;
+    }
+</script>
+
+<style scoped>
+    .v-card {
+        padding: 1rem;
+    }
+
+    .v-card-title {
+        font-size: 1.5rem;
+        font-weight: 500;
+    }
+
+    .v-alert {
+        white-space: pre-line;
+    }
+</style>
diff --git a/src/plugins/import/xml/import-xml.vue.new b/src/plugins/import/xml/import-xml.vue.new
new file mode 100644
index 0000000..34a39ef
--- /dev/null
+++ b/src/plugins/import/xml/import-xml.vue.new
@@ -0,0 +1,492 @@
+<!--
+ * XML Import Plugin - Vue Component
+ * Copyright 2025 GfSE (https://gfse.org)
+ * License and terms of use: Apache 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ -->
+<template>
+    <div class="xml-import-plugin">
+        <div class="plugin-header">
+            <h3>📄 XML Package Import</h3>
+            <p class="description">
+                Import PIG packages from XML format (.xml)
+            </p>
+        </div>
+
+        <!-- File Input Section -->
+        <div class="file-input-section">
+            <input ref="fileInput"
+                   type="file"
+                   accept=".xml"
+                   @change="handleFileSelect"
+                   style="display: none" />
+            <button @click="triggerFileSelect"
+                    class="btn-select-file"
+                    :disabled="isImporting">
+                📂 Select XML File
+            </button>
+            <span v-if="selectedFileName" class="selected-file">
+                {{ selectedFileName }}
+            </span>
+        </div>
+
+        <!-- Progress Indicator -->
+        <div v-if="isImporting" class="progress-section">
+            <div class="spinner"></div>
+            <p>Importing XML package...</p>
+        </div>
+
+        <!-- Success Message -->
+        <div v-if="importSuccess && !isImporting" class="message success-message">
+            <div class="message-icon">✅</div>
+            <div class="message-content">
+                <strong>Import Successful</strong>
+                <p>Successfully imported {{ importedItemCount }} items</p>
+            </div>
+        </div>
+
+        <!-- Error Message -->
+        <div v-if="importError && !isImporting" class="message error-message">
+            <div class="message-icon">❌</div>
+            <div class="message-content">
+                <strong>Import Failed</strong>
+                <p>{{ importError }}</p>
+            </div>
+        </div>
+
+        <!-- Warning Message for Partial Success -->
+        <div v-if="importWarning && !isImporting" class="message warning-message">
+            <div class="message-icon">⚠️</div>
+            <div class="message-content">
+                <strong>Partial Import</strong>
+                <p>{{ importWarning }}</p>
+            </div>
+        </div>
+
+        <!-- Preview Section -->
+        <div v-if="importedItems.length > 0 && !isImporting" class="preview-section">
+            <h4>Imported Items ({{ importedItems.length }})</h4>
+
+            <!-- Package Info -->
+            <div v-if="packageInfo" class="package-info">
+                <div class="info-row">
+                    <span class="label">Package ID:</span>
+                    <span class="value">{{ packageInfo.id }}</span>
+                </div>
+                <div class="info-row" v-if="packageInfo.title">
+                    <span class="label">Title:</span>
+                    <span class="value">{{ packageInfo.title }}</span>
+                </div>
+                <div class="info-row" v-if="packageInfo.modified">
+                    <span class="label">Modified:</span>
+                    <span class="value">{{ formatDate(packageInfo.modified) }}</span>
+                </div>
+            </div>
+
+            <!-- Item Statistics -->
+            <div class="item-statistics">
+                <h5>Item Types:</h5>
+                <div class="statistics-grid">
+                    <div v-for="(count, type) in itemTypeStats" :key="type" class="stat-item">
+                        <span class="stat-label">{{ formatItemType(type) }}</span>
+                        <span class="stat-count">{{ count }}</span>
+                    </div>
+                </div>
+            </div>
+
+            <!-- Item List (first 10) -->
+            <div class="item-list">
+                <h5>Items Preview (first {{ Math.min(10, graphItems.length) }}):</h5>
+                <ul>
+                    <li v-for="(item, index) in previewItems" :key="item.id || index">
+                        <span class="item-type">{{ item.itemType }}</span>
+                        <span class="item-id">{{ item.id }}</span>
+                    </li>
+                </ul>
+                <p v-if="graphItems.length > 10" class="more-items">
+                    ... and {{ graphItems.length - 10 }} more items
+                </p>
+            </div>
+
+            <!-- Action Buttons -->
+            <div class="action-buttons">
+                <button @click="resetImport" class="btn-secondary">
+                    Import Another File
+                </button>
+                <button @click="exportToJsonLD" class="btn-primary" :disabled="!canExport">
+                    Export to JSON-LD
+                </button>
+            </div>
+        </div>
+    </div>
+</template>
+
+<script setup lang="ts">
+    import { ref, computed } from 'vue';
+    import { XmlImporter } from './import-xml';
+    import type { TPigItem } from '@/common-code/schema/pig/ts/pig-metaclasses';
+
+    // Reactive state
+    const fileInput = ref<HTMLInputElement | null>(null);
+    const selectedFileName = ref('');
+    const isImporting = ref(false);
+    const importSuccess = ref(false);
+    const importError = ref('');
+    const importWarning = ref('');
+    const importedItems = ref<TPigItem[]>([]);
+
+    // Computed properties
+    const importedItemCount = computed(() =>
+        Math.max(0, importedItems.value.length - 1) // -1 for package
+);
+
+const graphItems = computed(() =>
+    importedItems.value.slice(1) // Skip package (first item)
+);
+
+const previewItems = computed(() =>
+    graphItems.value.slice(0, 10)
+);
+
+const packageInfo = computed(() => {
+    if (importedItems.value.length === 0) return null;
+    const pkg = importedItems.value[0];
+    const data = pkg.get();
+    return {
+        id: data?.id || 'Unknown',
+        title: data?.title?.[0]?.value || '',
+        modified: data?.modified || ''
+    };
+});
+
+const itemTypeStats = computed(() => {
+    const stats: Record<string, number> = {};
+    graphItems.value.forEach(item => {
+        const type = item.itemType || 'Unknown';
+        stats[type] = (stats[type] || 0) + 1;
+    });
+    return stats;
+});
+
+const canExport = computed(() =>
+    importedItems.value.length > 0 && importSuccess.value
+);
+
+// Methods
+function triggerFileSelect() {
+    fileInput.value?.click();
+}
+
+async function handleFileSelect(event: Event) {
+    const target = event.target as HTMLInputElement;
+    const file = target.files?.[0];
+
+    if (!file) return;
+
+    selectedFileName.value = file.name;
+
+    // Reset state
+    isImporting.value = true;
+    importSuccess.value = false;
+    importError.value = '';
+    importWarning.value = '';
+    importedItems.value = [];
+
+    try {
+        const result = await XmlImporter.import(file);
+
+        if (result.status === 0) {
+            // Full success
+            importedItems.value = result.response as TPigItem[];
+            importSuccess.value = true;
+        } else if (result.status === 691) {
+            // Partial success (some items failed)
+            importedItems.value = result.response as TPigItem[];
+            importWarning.value = result.statusText || 'Some items could not be imported';
+            importSuccess.value = true; // Still show as success with warning
+        } else {
+            // Failure
+            importError.value = result.statusText || 'Unknown error occurred';
+        }
+    } catch (err: any) {
+        importError.value = err?.message || String(err);
+    } finally {
+        isImporting.value = false;
+    }
+}
+
+function resetImport() {
+    selectedFileName.value = '';
+    importSuccess.value = false;
+    importError.value = '';
+    importWarning.value = '';
+    importedItems.value = [];
+    if (fileInput.value) {
+        fileInput.value.value = '';
+    }
+}
+
+function exportToJsonLD() {
+    // TODO: Implement JSON-LD export
+    console.log('Export to JSON-LD not yet implemented');
+    alert('Export to JSON-LD functionality will be implemented soon');
+}
+
+function formatDate(dateStr: string): string {
+    try {
+        return new Date(dateStr).toLocaleString();
+    } catch {
+        return dateStr;
+    }
+}
+
+function formatItemType(type: string): string {
+    return type.replace('pig:', '');
+}</script>
+
+<style scoped>
+    .xml-import-plugin {
+        padding: 1.5rem;
+        background: #fff;
+        border-radius: 8px;
+        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
+    }
+
+    .plugin-header h3 {
+        margin: 0 0 0.5rem;
+        color: #2c3e50;
+    }
+
+    .description {
+        margin: 0 0 1.5rem;
+        color: #7f8c8d;
+        font-size: 0.95em;
+    }
+
+    .file-input-section {
+        display: flex;
+        align-items: center;
+        gap: 1rem;
+        margin-bottom: 1.5rem;
+    }
+
+    .btn-select-file {
+        padding: 0.75rem 1.5rem;
+        background: #3498db;
+        color: white;
+        border: none;
+        border-radius: 6px;
+        font-size: 1em;
+        cursor: pointer;
+        transition: all 0.2s;
+    }
+
+        .btn-select-file:hover:not(:disabled) {
+            background: #2980b9;
+            transform: translateY(-1px);
+        }
+
+        .btn-select-file:disabled {
+            background: #bdc3c7;
+            cursor: not-allowed;
+        }
+
+    .selected-file {
+        color: #7f8c8d;
+        font-size: 0.9em;
+    }
+
+    .progress-section {
+        text-align: center;
+        padding: 2rem;
+    }
+
+    .spinner {
+        border: 4px solid #f3f3f3;
+        border-top: 4px solid #3498db;
+        border-radius: 50%;
+        width: 50px;
+        height: 50px;
+        animation: spin 1s linear infinite;
+        margin: 0 auto 1rem;
+    }
+
+    @keyframes spin {
+        0% {
+            transform: rotate(0deg);
+        }
+
+        100% {
+            transform: rotate(360deg);
+        }
+    }
+
+    .message {
+        display: flex;
+        gap: 1rem;
+        padding: 1rem;
+        border-radius: 6px;
+        margin-bottom: 1.5rem;
+    }
+
+    .message-icon {
+        font-size: 1.5em;
+    }
+
+    .message-content strong {
+        display: block;
+        margin-bottom: 0.25rem;
+    }
+
+    .success-message {
+        background: #d4edda;
+        color: #155724;
+        border: 1px solid #c3e6cb;
+    }
+
+    .error-message {
+        background: #f8d7da;
+        color: #721c24;
+        border: 1px solid #f5c6cb;
+    }
+
+    .warning-message {
+        background: #fff3cd;
+        color: #856404;
+        border: 1px solid #ffeaa7;
+    }
+
+    .preview-section {
+        border-top: 2px solid #ecf0f1;
+        padding-top: 1.5rem;
+    }
+
+        .preview-section h4,
+        .preview-section h5 {
+            color: #2c3e50;
+            margin: 0 0 1rem;
+        }
+
+    .package-info {
+        background: #f8f9fa;
+        padding: 1rem;
+        border-radius: 6px;
+        margin-bottom: 1.5rem;
+    }
+
+    .info-row {
+        display: flex;
+        gap: 1rem;
+        margin-bottom: 0.5rem;
+    }
+
+        .info-row:last-child {
+            margin-bottom: 0;
+        }
+
+    .label {
+        font-weight: 600;
+        color: #7f8c8d;
+        min-width: 100px;
+    }
+
+    .value {
+        color: #2c3e50;
+    }
+
+    .item-statistics {
+        margin-bottom: 1.5rem;
+    }
+
+    .statistics-grid {
+        display: grid;
+        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
+        gap: 0.75rem;
+    }
+
+    .stat-item {
+        display: flex;
+        justify-content: space-between;
+        padding: 0.5rem;
+        background: #ecf0f1;
+        border-radius: 4px;
+    }
+
+    .stat-label {
+        font-weight: 500;
+        color: #2c3e50;
+    }
+
+    .stat-count {
+        font-weight: 700;
+        color: #3498db;
+    }
+
+    .item-list ul {
+        list-style: none;
+        padding: 0;
+        margin: 0;
+    }
+
+    .item-list li {
+        display: flex;
+        gap: 1rem;
+        padding: 0.75rem;
+        border-bottom: 1px solid #ecf0f1;
+    }
+
+    .item-type {
+        font-weight: 600;
+        color: #3498db;
+        min-width: 120px;
+    }
+
+    .item-id {
+        color: #7f8c8d;
+        font-family: monospace;
+    }
+
+    .more-items {
+        margin-top: 0.5rem;
+        color: #7f8c8d;
+        font-style: italic;
+    }
+
+    .action-buttons {
+        display: flex;
+        gap: 1rem;
+        margin-top: 1.5rem;
+    }
+
+    .btn-primary,
+    .btn-secondary {
+        padding: 0.75rem 1.5rem;
+        border: none;
+        border-radius: 6px;
+        font-size: 1em;
+        cursor: pointer;
+        transition: all 0.2s;
+    }
+
+    .btn-primary {
+        background: #27ae60;
+        color: white;
+    }
+
+        .btn-primary:hover:not(:disabled) {
+            background: #229954;
+        }
+
+        .btn-primary:disabled {
+            background: #bdc3c7;
+            cursor: not-allowed;
+        }
+
+    .btn-secondary {
+        background: #ecf0f1;
+        color: #2c3e50;
+    }
+
+        .btn-secondary:hover {
+            background: #bdc3c7;
+        }
+</style>
diff --git a/src/plugins/import/xml/mount-import-xml.ts b/src/plugins/import/xml/mount-import-xml.ts
new file mode 100644
index 0000000..1cf60cd
--- /dev/null
+++ b/src/plugins/import/xml/mount-import-xml.ts
@@ -0,0 +1,69 @@
+/*!
+ * XML Import Plugin Registration
+ * Copyright 2025 GfSE (https://gfse.org)
+ * License and terms of use: Apache 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+ */
+/**
+ * Mounts the XML import plugin with the Vue application
+ * 
+ * Usage in main.ts:
+ * import { xmlImportPlugin } from './plugins/import/xml/mount-import-xml';
+ * 
+ * app.use(xmlImportPlugin);
+ */
+
+import type { App, Plugin } from 'vue';
+import XmlImportPlugin from './import-xml.vue';
+
+/**
+ * Plugin configuration options
+ */
+export interface XmlImportPluginOptions {
+    /**
+     * Maximum file size in bytes (default: 6MB)
+     */
+    maxFileSize?: number;
+
+    /**
+     * Custom error handler
+     */
+    onError?: (error: Error) => void;
+}
+
+/**
+ * XML Import Plugin installer
+ * Implements Vue Plugin interface for use with app.use()
+ */
+export const xmlImportPlugin: Plugin = {
+    install(app: App, options: XmlImportPluginOptions = {}) {
+        // Store options in app.config.globalProperties for component access
+        app.config.globalProperties.$xmlImportOptions = {
+            maxFileSize: options.maxFileSize || 6 * 1024 * 1024, // 6MB default
+            onError: options.onError || ((error: Error) => console.error('XML Import Error:', error))
+        };
+
+        // Mount component globally
+        app.component('Import-XML', XmlImportPlugin);
+
+        // all mounted components are logged in main.ts ...
+    }
+};
+
+/**
+ * Export business logic for programmatic use
+ */
+// export { XmlImporter } from '../../../common-code/import/xml/import-xml';
+
+/**
+ * Type declarations for global properties
+ */
+declare module '@vue/runtime-core' {
+    interface ComponentCustomProperties {
+        $xmlImportOptions?: {
+            maxFileSize: number;
+            onError: (error: Error) => void;
+        };
+    }
+}
+
+export default xmlImportPlugin;
diff --git a/src/router/index.ts b/src/router/index.ts
index 0671a5d..1de1fe8 100644
--- a/src/router/index.ts
+++ b/src/router/index.ts
@@ -1,29 +1,29 @@
 import { createRouter, createWebHistory, RouteRecordRaw } from 'vue-router';
-import Home from '@/components/Home.vue';
-import Dashboards from '@/components/Dashboards.vue';
-import Interfaces from '@/components/Interfaces.vue';
-import Viewing from '@/components/Viewing.vue';
+import AppHome from '@/components/Home.vue';
+import AppDashboards from '@/components/Dashboards.vue';
+import AppInterfaces from '@/components/Interfaces.vue';
+import AppView from '@/components/Viewing.vue';
 
 const routes: Array<RouteRecordRaw> = [
     {
     path: '/',
     name: 'Home',
-    component: Home,
+    component: AppHome,
   },
   {
     path: '/dashboards',
     name: 'Dashboards',
-    component: Dashboards,
+    component: AppDashboards,
   },
   {
     path: '/interfaces',
     name: 'Interfaces',
-    component: Interfaces,
+    component: AppInterfaces,
   },
   {
     path: '/viewing',
     name: 'Viewing',
-    component: Viewing,
+    component: AppView,
   }
 ];
 
diff --git a/src/styles/main.css b/src/styles/main.css
new file mode 100644
index 0000000..dce3931
--- /dev/null
+++ b/src/styles/main.css
@@ -0,0 +1,32 @@
+/* The google web-fonts Roboto and Montserrat must be loaded in the app's index.html */
+body, .v-application {
+    font-family: 'Roboto', Arial, sans-serif;
+    font-weight: 400;
+}
+
+h1, h2, h3,
+.banner-title,
+.v-app-bar-title,
+.v-toolbar-title,
+.v-toolbar-title__placeholder {
+    font-family: 'Montserrat', 'Roboto', Arial, sans-serif !important;
+    font-weight: 400 !important;
+}
+
+h1 {
+    font-size: 1.8rem;
+}
+
+h2 {
+    font-size: 1.5rem;
+}
+
+h3 {
+    font-size: 1.2rem;
+}
+.banner-title,
+.v-app-bar-title,
+.v-toolbar-title,
+.v-toolbar-title__placeholder {
+    font-size: 1.8rem;
+}
diff --git a/src/utils/import/ReqIF/import-reqif.ts b/src/utils/import/ReqIF/import-reqif.ts
deleted file mode 100644
index 175a590..0000000
--- a/src/utils/import/ReqIF/import-reqif.ts
+++ /dev/null
@@ -1,172 +0,0 @@
-/*!
- * Imports a ReqIF XML document and transforms it using the ReqIF-to-PIG stylesheet.
- * Copyright 2025 GfSE (https://gfse.org)
- * License and terms of use: Apache 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
- * We appreciate any correction, comment or contribution as Github issue (https://github.com/GfSE/CASCaDE-Reference-Implementation/issues)
- */
-/**
- * Imports a ReqIF XML document and transforms it using a ReqIF-to-PIG stylesheet.
- *  Authors: oskar.dungern@gfse.org
- * 
- * Security note: Uses saxon-js which has a transitive dependency on @xmldom/xmldom
- * with known vulnerabilities. Input is validated and size-limited. See docs/SECURITY.md
- *
- * Design Decisions:
- * - SEF stylesheet is loaded from public/assets/xslt/ in both environments
- * - Browser: fetches via HTTP from /assets/xslt/
- * - Node.js: reads from local public/assets/xslt/ directory
- * - Single source of truth: SEF file stored only in public/assets/xslt/
- * 
- * ToDo:
- * - Decide whether the file is read within or outside the import function.
- *   Here it is outside, but in case of importXML() and importSJSONLD(), it is inside.
- * - Extend the constraint checks - very limited now.
- * 
- * @param xmlString - The XML document to import
- * @param filename - The name of the file being imported (for error messages)
- * @returns IRsp containing the transformed XML document or error messages
- */
-
-import { LOG } from '../../lib/helpers';
-import { PIN } from '../../lib/platform-independence';
-import { IRsp, /*Rsp,*/ Msg, rspOK } from '../../lib/messages';
-import { APackage, TPigItem, stringXML } from '../../schemas/pig/ts/pig-metaclasses';
-import { ConstraintCheckType } from '../../schemas/pig/ts/pig-package-constraints';
-
-const MAX_XML_SIZE = 4 * 1024 * 1024;
-
-/**
- * Get platform-appropriate path to ReqIF-to-PIG stylesheet
- * - Browser: URL to public asset (/assets/xslt/)
- * - Node.js: Local filesystem path to public directory (public/assets/xslt/)
- * 
- * @returns Path/URL to ReqIF-to-PIG.sef.json
- */
-function getStylesheetPath(): string {
-    if (PIN.isBrowserEnv()) {
-        // Browser: fetch from public directory via HTTP
-        const baseUrl = window.location.origin;
-        return `${baseUrl}/assets/xslt/ReqIF-to-PIG.sef.json`;
-    } else {
-        // Node.js: read from local public directory
-        return './public/assets/xslt/ReqIF-to-PIG.sef.json';
-    }
-}
-
-export async function importReqif(
-    xmlString: stringXML,
-    filename: string
-    //    options?: any
-): Promise<IRsp<unknown>> {
-    // Check file extension
-    if (!filename.toLowerCase().endsWith('.reqif')) {
-        return Msg.create(660, filename, 'expected .reqif file extension');
-    }
-
-    // Security: Size limit check
-    if (xmlString.length > MAX_XML_SIZE) {
-        return Msg.create(660, filename, `file too large (max ${MAX_XML_SIZE / 1024 / 1024}MB)`);
-    }
-
-    // Security: Basic XML structure validation before parsing
-    if (!xmlString.trim().startsWith('<?xml') && !xmlString.trim().startsWith('<')) {
-        return Msg.create(660, filename, 'invalid XML structure');
-    }
-
-    /*    const rspRead = await LIB.readFileAsText(source);
-        if (!rspRead.ok)
-            return rspRead;
-    
-        const xmlString = rspRead.response as string;
-        // LOG.info('importXML: loaded text length ' + xmlString.length); 
-    */
-    const parser = PIN.createDOMParser();
-    const xmlDoc = parser.parseFromString(xmlString, 'text/xml');
-
-    // LOG.debug(`importReqIF: parsed XML document with root element <${xmlDoc.documentElement?.tagName}>`);
-    // Check for parsing errors
-    const sourceError = PIN.getXmlParseError(xmlDoc);
-    if (sourceError) {
-        return Msg.create(660, filename, sourceError.textContent ?? 'Unknown error');
-    }
-
-    // Validate that it's a ReqIF XML document
-    if (!isValidReqIFDocument(xmlDoc)) {
-        return Msg.create(660, filename, 'missing required ReqIF namespace or root element');
-    }
-
-    // In future, we will support different transformation methods:
-    //    const method = options?.method || 'XSLT';
-
-    // Get platform-appropriate stylesheet path
-    const stylesheetPath = getStylesheetPath();
-    LOG.debug(`importReqIF: using stylesheet path: ${stylesheetPath}`);
-
-    // LOG.debug(`importReqIF: starting transformation using stylesheet ${stylesheetPath}...`);
-    // Transform the document
-    const rsp = await PIN.transformXSL(xmlString, stylesheetPath);
-
-    if (!rsp.ok) {
-        return Msg.create(660, filename, rsp.statusText ?? 'Unknown error');
-    }
-
-    // LOG.debug('importReqIF: transformation successful', rsp.response);
-    const aPackage = new APackage().setXML(
-        rsp.response as string,
-        // input has only instances, so omit constraint checks on classes:
-        {
-            checkConstraints: [
-                ConstraintCheckType.UniqueIds
-                //    ConstraintCheckType.aPropertyHasClass,
-                //    ConstraintCheckType.aLinkHasClass,
-                //    ConstraintCheckType.anEntityHasClass,
-                //    ConstraintCheckType.aRelationshipHasClass,
-            ] as ConstraintCheckType[]
-        }
-    );
-
-    // Check if package was successfully created
-    if (!aPackage.status().ok) {
-        return aPackage.status();
-    }
-
-    // allItems[0] is the package itself, rest are graph items:
-    const allItems = aPackage.getItems();
-
-    // const actualCount = allItems.length - 1;
-    // LOG.info(`importReqIF: successfully instantiated ${actualCount} items`);
-
-    // Return all items (package + graph items)
-    const result = rspOK;
-    result.response = allItems;
-    result.responseType = 'json';
-
-    return result as IRsp<TPigItem[]>;
-}
-
-/**
- * Validates that the XML document is a valid ReqIF document.
- * 
- * @param xmlDoc - The XML document to validate
- * @returns True if the document is a valid ReqIF document
- */
-function isValidReqIFDocument(xmlDoc: Document): boolean {
-    const rootElement = xmlDoc.documentElement;
-
-    if (!rootElement) {
-        return false;
-    }
-
-    // Check for ReqIF namespace
-    const reqifNamespace = 'http://www.omg.org/spec/ReqIF/20110401/reqif.xsd';
-    const hasReqIFNamespace = rootElement.namespaceURI === reqifNamespace ||
-        rootElement.getAttribute('xmlns') === reqifNamespace ||
-        rootElement.lookupNamespaceURI('reqif') === reqifNamespace;
-
-    // Check for REQ-IF root element
-    const isReqIFRoot = rootElement.localName === 'REQ-IF' ||
-        rootElement.tagName === 'REQ-IF' ||
-        rootElement.tagName === 'reqif:REQ-IF';
-
-    return hasReqIFNamespace && isReqIFRoot;
-}
diff --git a/src/utils/import/jsonld/import-package-jsonld.ts b/src/utils/import/jsonld/import-package-jsonld.ts
deleted file mode 100644
index c03aaa3..0000000
--- a/src/utils/import/jsonld/import-package-jsonld.ts
+++ /dev/null
@@ -1,118 +0,0 @@
-/*! Cross-environment JSON-LD importer.
- * Copyright 2025 GfSE (https://gfse.org)
- * License and terms of use: Apache 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
- */
-/**
- * Cross-environment JSON-LD importer.
- * - Accepts a Node file path, an http(s) URL string or a browser File/Blob.
- * - Extracts elements from '@graph' (or 'graph'), converts JSON-LD keys to internal keys
- *   and instantiates matching PIG class instances where possible.
- *
- *  Dependencies:
- *  Authors: oskar.dungern@gfse.org, ..
- *  License and terms of use: Apache 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
- *  We appreciate any correction, comment or contribution as Github issue (https://github.com/GfSE/CASCaDE-Reference-Implementation/issues)
- *
- * Usage:
- * - Node:   await importJsonLd('C:/path/to/file.jsonld')
- * - URL:    await importJsonLd('https://example/.../doc.jsonld')
- * - Browser: await importJsonLd(fileInput.files[0])
- */
-
-import { IRsp, rspOK, Msg } from '../../lib/messages';
-import { LOG } from '../../lib/helpers';
-import { PIN } from '../../lib/platform-independence';
-import { APackage, TPigItem } from '../../schemas/pig/ts/pig-metaclasses';
-import { SCH_LD } from '../../schemas/pig/jsonld/pig-schemata-jsonld';
-// import { ConstraintCheckType } from '../../schemas/pig/ts/pig-package-constraints';
-
-/**
- * JSON-LD document structure
- */
-interface JsonLdDocument {
-    '@context'?: unknown;
-    '@graph'?: unknown[];
-    '@id'?: string;
-    '@type'?: string | string[];
-    [key: string]: unknown;
-}
-
-/**
- * Import JSON-LD document and instantiate PIG items
- * @param source - File path, URL, or File/Blob object
- * @returns IRsp with array of TPigItem (first item is APackage, rest are graph items)
- */
-export async function importJSONLD(source: string | File | Blob): Promise<IRsp> {
-    // LOG.debug('importJSONLD: starting import from source', source);
-    const rsp = await PIN.readFileAsText(source);
-    if (!rsp.ok)
-        return rsp;
-
-    const text = rsp.response as string;
-
-    let doc: JsonLdDocument;
-    try {
-        doc = JSON.parse(text) as JsonLdDocument;
-    } catch (err: unknown) {
-        const errorMessage = err instanceof Error ? err.message : String(err);
-        return Msg.create(690, 'JSON-LD', errorMessage);
-    }
-
-    // Validate entire JSON-LD document structure
-    const isValidPackage = await SCH_LD.validatePackageLD(doc);
-    if (!isValidPackage) {
-        const errors = await SCH_LD.getValidatePackageLDErrors();
-        LOG.error('JSON-LD package validation failed:', errors);
-        return Msg.create(697, 'JSON-LD', errors);
-    }
-
-    // Instantiate APackage and load the document
-    const aPackage = new APackage().setJSONLD(doc); // apply all constraint checks by default
-    /*  keeping it because it will be needed when implementing further consistency checks:
-        const aPackage = new APackage().setJSONLD(
-            doc,
-            // some examples are incomplete, so we skip the tests for specializes:
-            {checkConstraints: [
-                ConstraintCheckType.UniqueIds,
-                ConstraintCheckType.aPropertyHasClass,
-                ConstraintCheckType.aLinkHasClass,
-                ConstraintCheckType.anEntityHasClass,
-                ConstraintCheckType.aRelationshipHasClass,
-            ]}
-        );
-    
-    // Check if package was successfully created
-    if (!aPackage.status().ok) {
-        return aPackage.status();
-    } */
-
-    const allItems = aPackage.getItems();
-
-    // allItems[0] is the package itself, rest are graph items
-
-    const expectedCount = doc['@graph']?.length || 0;
-    const actualCount = allItems.length - 1;
-
-    let result: IRsp;
-    if (actualCount === expectedCount) {
-        LOG.info(`importJSONLD: successfully instantiated package with all ${actualCount} items`);
-        result = rspOK;
-    } else {
-        let str = '\nErroneous items:';
-        for (let i = 1; i < allItems.length; i++) {
-            const st = allItems[i].status();
-            if(!st.ok)
-                str += `\n- graph[${i}]: (${st.status}) /${st.statusText}`;
-        }
-        LOG.warn(`importJSONLD: instantiated ${actualCount} of ${expectedCount} items` + str);
-
-        result = Msg.create(691, 'JSON-LD', actualCount, expectedCount);
-    }
-
-    // Return all items (package + graph items)
-    result.response = allItems;
-    result.responseType = 'json';
-
-    return result as IRsp<TPigItem[]>;
-}
-
diff --git a/src/utils/import/xml/import-package-xml.ts b/src/utils/import/xml/import-package-xml.ts
deleted file mode 100644
index 8db7585..0000000
--- a/src/utils/import/xml/import-package-xml.ts
+++ /dev/null
@@ -1,109 +0,0 @@
-/*! Cross-environment XML importer.
- * Copyright 2025 GfSE (https://gfse.org)
- * License and terms of use: Apache 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
- */
-/**
- * Cross-environment XML importer.
- * - Accepts a Node file path, an http(s) URL string or a browser File/Blob.
- * - Parses XML document, converts XML structure to internal keys
- *   and instantiates matching PIG class instances where possible.
- *
- * Authors: oskar.dungern@gfse.org
- * 
- * Usage:
- * - Node:   await importXML('C:/path/to/file.xml')
- * - URL:    await importXML('https://example/.../doc.xml')
- * - Browser: await importXML(fileInput.files[0])
- */
-
-import { IRsp, rspOK, Msg } from '../../lib/messages';
-import { LOG } from '../../lib/helpers';
-import { PIN } from '../../lib/platform-independence';
-import { APackage, TPigItem } from '../../schemas/pig/ts/pig-metaclasses';
-//import { ConstraintCheckType } from '../../schemas/pig/ts/pig-package-constraints';
-
-/**
- * Import XML document and instantiate PIG items
- * @param source - File path, URL, or File/Blob object
- * @returns IRsp with array of TPigItem (first item is APackage, rest are graph items)
- */
-export async function importXML(source: string | File | Blob): Promise<IRsp> {
-    const rsp = await PIN.readFileAsText(source);
-    if (!rsp.ok)
-        return rsp;
-
-    const xmlString = rsp.response as string;
-    // LOG.info('importXML: loaded text length ' + xmlString.length);
-
-    // Optional: Pre-validate XML syntax
-    try {
-        const parser = PIN.createDOMParser();
-
-        const doc = parser.parseFromString(xmlString, 'text/xml');
-        const parserError = PIN.getXmlParseError(doc);
-
-        if (parserError) {
-            const errorMessage = parserError.textContent || 'Unknown XML parsing error';
-            return Msg.create(690, 'XML', errorMessage);
-        }
-    } catch (err: any) {
-        return Msg.create(690, 'XML', err?.message ?? err);
-    }
-    /*
-        // Validate entire XML document structure
-        const isValidPackage = await SCH_XSD.validatePackageXML(doc);
-        if (!isValidPackage) {
-            const errors = await SCH_XSD.getValidatePackageXMLErrors();
-            LOG.error('XML package validation failed:', errors);
-            return Msg.create(697, 'XML', errors);
-        }
-    */
-
-    // Instantiate APackage directly from XML string
-    const aPackage = new APackage().setXML(xmlString); // apply all constraint checks by default
-/*  keeping it because it will be needed when implementing further consistency checks:
-    const aPackage = new APackage().setXML(
-        xmlString,
-        // some examples are incomplete, so we skip the tests for specializes:
-        [
-            ConstraintCheckType.UniqueIds,
-            ConstraintCheckType.aPropertyHasClass,
-            ConstraintCheckType.aLinkHasClass,
-            ConstraintCheckType.anEntityHasClass,
-            ConstraintCheckType.aRelationshipHasClass,
-        ]
-    );
-
-    // Check if package was successfully created
-    if (!aPackage.status().ok) {
-        return aPackage.status();
-    }
-*/
-    // allItems[0] is the package itself, rest are graph items:
-    const allItems = aPackage.getItems();
-    
-    const expectedCount = aPackage.graph?.length || 0;
-    const actualCount = allItems.length - 1;
-    
-    let result: IRsp;
-    if (actualCount === expectedCount) {
-        LOG.info(`importXML: successfully instantiated package with all ${actualCount} items`);
-        result = rspOK;
-    } else {
-        let str = '\nErroneous items:';
-        for (let i = 1; i < allItems.length; i++) {
-            const st = allItems[i].status();
-            if (!st.ok)
-                str += `\n- graph[${i}]: (${st.status}) /${st.statusText}`;
-        }
-        LOG.warn(`importJXML: instantiated ${actualCount} of ${expectedCount} items` + str);
-
-        result = Msg.create(691, 'XML', actualCount, expectedCount);
-    }
-
-    // Return all items (package + graph items)
-    result.response = allItems;
-    result.responseType = 'json';
-    
-    return result as IRsp<TPigItem[]>;
-}
diff --git a/src/utils/lib/build-info.ts b/src/utils/lib/build-info.ts
deleted file mode 100644
index 80e367c..0000000
--- a/src/utils/lib/build-info.ts
+++ /dev/null
@@ -1,9 +0,0 @@
-// Auto-generated by scripts/generate-build-info.js - DO NOT EDIT
-// Generated at: 2026-02-12T16:29:56.269Z
-
-export const BUILD_INFO = {
-    buildTime: '2026-02-12T16:29:56.269Z',
-    gitCommit: '339dc77',
-    gitBranch: '50-html-loader',
-    gitDirty: false
-};
diff --git a/src/utils/schemas/pig/jsonld/pig-schemata-jsonld.ts.goodButReplaced b/src/utils/schemas/pig/jsonld/pig-schemata-jsonld.ts.goodButReplaced
deleted file mode 100644
index 7f64c56..0000000
--- a/src/utils/schemas/pig/jsonld/pig-schemata-jsonld.ts.goodButReplaced
+++ /dev/null
@@ -1,711 +0,0 @@
-/*! JSON-LD SCHEMATA for PIG items
- * Copyright 2025 GfSE (https://gfse.org)
- * License and terms of use: Apache 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
- */
-/** JSON-LD SCHEMATA for PIG items: Property, Link, Entity, Relationship, AnEntity, ARelationship
- *  These schemas validate the JSON-LD representation (with @id, @type, @value, etc.)
- *  
- *  Dependencies: ajv (Another JSON Schema Validator) https://ajv.js.org/
- *  Authors: oskar.dungern@gfse.org, ..
- *  We appreciate any correction, comment or contribution as Github issue (https://github.com/GfSE/CASCaDE-Reference-Implementation/issues)
- *
- * Design decisions:
- * - in this solution, the JSON-LD schemata are hard-coded in TypeScript
- *   while the preferred solution is to load them from external files.
- * - use JSON Schema draft-07 (widely supported)
- * - use ajv for validation (fast, popular)
- * - these schemas validate JSON-LD documents (@graph, @context, @id, @type)
- * - separate from internal JSON schemas (pig-schemata.ts)
- *
- * Limitations:
- * - xs:datatype values are only pattern-validated here; specific accepted values are validated in code
- * - further constraints (e.g. maxCount >= minCount) are validated in code
- * - eligible values in Property only for string values; other datatypes to be implemented
- *
- * ToDo:
- * - load schemata from external files, as soon as a server with CORS enabled is available
-*/
-
-import { ajv } from '../../../../plugins/ajv';
-
-const SCHEMA_PATH = 'http://product-information-graph.org/schema/2026-01-12/jsonld/';
-const ID_NAME_PATTERN = '^(?:[A-Za-z0-9_\\-]+:[^:\\s]+|https?:\\/\\/[^\\s]+)$';
-
-/* Shared JSON-LD definitions */
-const JSONLD_DEFS = {
-    idString: {
-        type: 'string',
-        pattern: ID_NAME_PATTERN
-    },
-    idObject: {
-        type: 'object',
-        required: ['@id'],
-        properties: {
-            '@id': { $ref: '#/$defs/idString'  }
-        },
-        additionalProperties: false
-    },
-    languageValue: {
-        type: 'object',
-        required: ['@value'],
-        properties: {
-            '@value': { type: 'string' },
-            '@language': { type: 'string' }
-        },
-        additionalProperties: false
-    }
-};
-
-/* PROPERTY_LD_SCHEMA: validates JSON-LD representation of IProperty */
-const PROPERTY_LD_SCHEMA = {
-    $schema: 'http://json-schema.org/draft-07/schema#',
-    $id: `${SCHEMA_PATH}Property`,
-    type: 'object',
-    properties: {
-        '@id': { $ref: '#/$defs/idString' },
-        '@type': { $ref: '#/$defs/idString' },
-        'pig:specializes': { $ref: '#/$defs/idObject' },
-        'pig:itemType': {
-            type: 'object',
-            required: ['@id'],
-            properties: {
-                '@id': {
-                    type: 'string',
-                    enum: ['pig:Property'],
-                    description: 'The PigItemType for pig:Property'
-                }
-            },
-            additionalProperties: false
-        },
-        'dcterms:title': {
-            type: 'array',
-            minItems: 1,
-            items: { $ref: '#/$defs/languageValue' }
-        },
-        'dcterms:description': {
-            type: 'array',
-            minItems: 1,
-            items: { $ref: '#/$defs/languageValue' }
-        },
-        'sh:datatype': { $ref: '#/$defs/idObject' },
-        'sh:minCount': { type: 'number' },
-        'sh:maxCount': { type: 'number' },
-        'sh:maxLength': { type: 'number' },
-        'sh:minInclusive': { type: 'number' },
-        'sh:maxInclusive': { type: 'number' },
-        'sh:pattern': { type: 'string' },
-        'pig:unit': { type: 'string' },
-        'sh:defaultValue': { type: 'string' },
-        'pig:eligibleValue': {
-            type: 'array',
-            items: {
-                type: 'object',
-                required: ['@id', 'dcterms:title'],
-                properties: {
-                    '@id': { $ref: '#/$defs/idString' },
-                    'dcterms:title': {
-                        type: 'array',
-                        minItems: 1,
-                        items: { $ref: '#/$defs/languageValue' }
-                    }
-                },
-                additionalProperties: false
-            }
-        },
-        'pig:composedProperty': {
-            type: 'array',
-            items: { $ref: '#/$defs/idObject' }
-        }
-    },
-    required: ['@id', 'pig:itemType', 'dcterms:title', 'sh:datatype'],
-    oneOf: [
-        { required: ['@type'] },
-        { required: ['pig:specializes'] }
-    ],
-    additionalProperties: false,
-    $defs: JSONLD_DEFS
-};
-/* LINK_LD_SCHEMA: validates JSON-LD representation of ILink */
-const LINK_LD_SCHEMA = {
-    $schema: 'http://json-schema.org/draft-07/schema#',
-    $id: `${SCHEMA_PATH}Link`,
-    type: 'object',
-    properties: {
-        '@id': { $ref: '#/$defs/idString' },
-        '@type': { $ref: '#/$defs/idString' },
-        'pig:specializes': { $ref: '#/$defs/idObject' },
-        'pig:itemType': {
-            type: 'object',
-            required: ['@id'],
-            properties: {
-                '@id': {
-                    type: 'string',
-                    enum: ['pig:Link'],
-                    description: 'The PigItemType for pig:Property'
-                }
-            },
-            additionalProperties: false
-        },
-        'dcterms:title': {
-            type: 'array',
-            minItems: 1,
-            items: { $ref: '#/$defs/languageValue' }
-        },
-        'dcterms:description': {
-            type: 'array',
-            items: { $ref: '#/$defs/languageValue' }
-        },
-        'pig:eligibleEndpoint': {
-            type: 'array',
-            minItems: 1,
-            items: { $ref: '#/$defs/idObject' }
-        }
-    },
-    required: ['@id', 'pig:itemType', 'dcterms:title', 'pig:eligibleEndpoint'],
-    oneOf: [
-        { required: ['@type'] },
-        { required: ['pig:specializes'] }
-    ],
-    additionalProperties: false,
-    $defs: JSONLD_DEFS
-};
-
-/* ENTITY_LD_SCHEMA: validates JSON-LD representation of IEntity */
-const ENTITY_LD_SCHEMA = {
-    $schema: 'http://json-schema.org/draft-07/schema#',
-    $id: `${SCHEMA_PATH}Entity`,
-    type: 'object',
-    properties: {
-        '@id': { $ref: '#/$defs/idString' },
-        '@type': { $ref: '#/$defs/idString' },
-        'pig:specializes': { $ref: '#/$defs/idObject' },
-        'pig:itemType': {
-            type: 'object',
-            required: ['@id'],
-            properties: {
-                '@id': {
-                    type: 'string',
-                    enum: ['pig:Entity'],
-                    description: 'The PigItemType for pig:Property'
-                }
-            },
-            additionalProperties: false
-        },
-        'dcterms:title': {
-            type: 'array',
-            items: { $ref: '#/$defs/languageValue' }
-        },
-        'dcterms:description': {
-            type: 'array',
-            items: { $ref: '#/$defs/languageValue' }
-        },
-        'pig:eligibleProperty': {
-            type: 'array',
-            items: { $ref: '#/$defs/idObject' }
-        },
-        'pig:eligibleTargetLink': {
-            type: 'array',
-            items: { $ref: '#/$defs/idObject' }
-        },
-        'pig:icon': {
-            type: 'object',
-            properties: {
-                '@value': { type: 'string' }
-            }
-        }
-    },
-    required: ['@id', 'pig:itemType', 'dcterms:title'],
-    oneOf: [
-        { required: ['@type'] },
-        { required: ['pig:specializes'] }
-    ],
-    additionalProperties: false,
-    $defs: JSONLD_DEFS
-};
-
-/* RELATIONSHIP_LD_SCHEMA: validates JSON-LD representation of IRelationship */
-const RELATIONSHIP_LD_SCHEMA = {
-    $schema: 'http://json-schema.org/draft-07/schema#',
-    $id: `${SCHEMA_PATH}Relationship`,
-    type: 'object',
-    properties: {
-        '@id': { $ref: '#/$defs/idString' },
-        '@type': { $ref: '#/$defs/idString' },
-        'pig:specializes': { $ref: '#/$defs/idObject' },
-        'pig:itemType': {
-            type: 'object',
-            required: ['@id'],
-            properties: {
-                '@id': {
-                    type: 'string',
-                    enum: ['pig:Relationship'],
-                    description: 'The PigItemType for pig:Property'
-                }
-            },
-            additionalProperties: false
-        },
-        'dcterms:title': {
-            type: 'array',
-            items: { $ref: '#/$defs/languageValue' }
-        },
-        'dcterms:description': {
-            type: 'array',
-            items: { $ref: '#/$defs/languageValue' }
-        },
-        'pig:eligibleProperty': {
-            type: 'array',
-            items: { $ref: '#/$defs/idObject' }
-        },
-        'pig:eligibleSourceLink': { $ref: '#/$defs/idObject' },
-        'pig:eligibleTargetLink': { $ref: '#/$defs/idObject' },
-        'pig:icon': {
-            type: 'object',
-            properties: {
-                '@value': { type: 'string' }
-            }
-        }
-    },
-    required: ['@id', 'pig:itemType', 'dcterms:title'],
-    oneOf: [
-        { required: ['@type'] },
-        { required: ['pig:specializes'] }
-    ],
-    additionalProperties: false,
-    $defs: JSONLD_DEFS
-};
-
-/* ANENTITY_LD_SCHEMA: validates JSON-LD representation of IAnEntity */
-const ANENTITY_LD_SCHEMA = {
-    $schema: 'http://json-schema.org/draft-07/schema#',
-    $id: `${SCHEMA_PATH}AnEntity`,
-    type: 'object',
-    properties: {
-        '@id': { $ref: '#/$defs/idString' },
-        '@type': { $ref: '#/$defs/idString' },
-        'pig:itemType': {
-            type: 'object',
-            required: ['@id'],
-            properties: {
-                '@id': {
-                    type: 'string',
-                    enum: ['pig:anEntity'],
-                    description: 'The PigItemType for pig:anEntity'
-                }
-            },
-            additionalProperties: false
-        },
-        'pig:revision': { type: 'string' },
-        'pig:priorRevision': {
-            type: 'array',
-            items: { type: 'string' }
-        },
-        'dcterms:modified': { type: 'string', format: 'date-time' },
-        'dcterms:creator': { type: 'string' },
-        'dcterms:title': {
-            type: 'array',
-            items: { $ref: '#/$defs/languageValue' }
-        },
-        'dcterms:description': {
-            type: 'array',
-            items: { $ref: '#/$defs/languageValue' }
-        }
-    },
-    patternProperties: {
-        '^(?!pig:itemType|pig:revision|pig:priorRevision|@id|@type|dcterms:modified|dcterms:creator|dcterms:title|dcterms:description)([A-Za-z0-9_\\-]+:[^:\\s]+|https?:\\/\\/[^\\s]+)$': {
-            type: 'array',
-            items: {
-                type: 'object',
-                properties: {
-                    'pig:itemType': {
-                        type: 'object',
-                        required: ['@id'],
-                        properties: {
-                            '@id': {
-                                type: 'string',
-                                enum: ['pig:aProperty', 'pig:aTargetLink']
-                            }
-                        },
-                        additionalProperties: false
-                    },
-                    '@value': { type: 'string' },
-                    '@id': { $ref: '#/$defs/idString' }
-                },
-                required: ['pig:itemType'],
-                oneOf: [
-                    {
-                        // aProperty with direct value: must have @value
-                        type: 'object',
-                        properties: {
-                            'pig:itemType': {
-                                type: 'object',
-                                properties: {
-                                    '@id': { const: 'pig:aProperty' }
-                                }
-                            }
-                        },
-                        required: ['@value'],
-                        not: { required: ['@id'] }
-                    },
-                    {
-                        // aProperty with enumeration reference: must have @id
-                        type: 'object',
-                        properties: {
-                            'pig:itemType': {
-                                type: 'object',
-                                properties: {
-                                    '@id': { const: 'pig:aProperty' }
-                                }
-                            }
-                        },
-                        required: ['@id'],
-                        not: { required: ['@value'] }
-                    },
-                    {
-                        // aTargetLink: must have @id
-                        type: 'object',
-                        properties: {
-                            'pig:itemType': {
-                                type: 'object',
-                                properties: {
-                                    '@id': { const: 'pig:aTargetLink' }
-                                }
-                            }
-                        },
-                        required: ['@id'],
-                        not: { required: ['@value'] }
-                    }
-                ],
-                additionalProperties: false
-            }
-        }
-    },
-    required: ['@id', 'pig:itemType', '@type', 'dcterms:modified'],
-    anyOf: [
-        {
-            required: ['dcterms:title'],
-            properties: { 'dcterms:title': { type: 'array', minItems: 1 } }
-        },
-        {
-            required: ['dcterms:description'],
-            properties: { 'dcterms:description': { type: 'array', minItems: 1 } }
-        }
-    ],
-    additionalProperties: false,
-    $defs: JSONLD_DEFS
-};
-
-/* ARELATIONSHIP_LD_SCHEMA: validates JSON-LD representation of IARelationship */
-const ARELATIONSHIP_LD_SCHEMA = {
-    $schema: 'http://json-schema.org/draft-07/schema#',
-    $id: `${SCHEMA_PATH}ARelationship`,
-    type: 'object',
-    properties: {
-        '@id': { $ref: '#/$defs/idString' },
-        '@type': { $ref: '#/$defs/idString' },
-        'pig:itemType': {
-            type: 'object',
-            required: ['@id'],
-            properties: {
-                '@id': {
-                    type: 'string',
-                    enum: ['pig:aRelationship'],
-                    description: 'The PigItemType for pig:aRelationship'
-                }
-            },
-            additionalProperties: false
-        },
-        'pig:revision': { type: 'string' },
-        'pig:priorRevision': {
-            type: 'array',
-            items: { type: 'string' }
-        },
-        'dcterms:modified': { type: 'string', format: 'date-time' },
-        'dcterms:creator': { type: 'string' },
-        'dcterms:title': {
-            type: 'array',
-            items: { $ref: '#/$defs/languageValue' }
-        },
-        'dcterms:description': {
-            type: 'array',
-            items: { $ref: '#/$defs/languageValue' }
-        }
-    },
-    patternProperties: {
-        // Match configurable properties and links, but exclude standard PIG properties
-        // Negative lookahead: don't match properties that are already defined in 'properties'
-        '^(?!pig:itemType|pig:revision|pig:priorRevision|@id|@type|dcterms:modified|dcterms:creator|dcterms:title|dcterms:description)([A-Za-z0-9_\\-]+:[^:\\s]+|https?:\\/\\/[^\\s]+)$': {
-            type: 'array',
-            items: {
-                type: 'object',
-                properties: {
-                    'pig:itemType': {
-                        type: 'object',
-                        required: ['@id'],
-                        properties: {
-                            '@id': {
-                                type: 'string',
-                                enum: ['pig:aProperty', 'pig:aSourceLink', 'pig:aTargetLink']
-                            }
-                        },
-                        additionalProperties: false
-                    },
-                    '@value': { type: 'string' },
-                    '@id': { $ref: '#/$defs/idString' }
-                },
-                required: ['pig:itemType'],
-                oneOf: [
-                    {
-                        // aProperty with direct value: must have @value
-                        type: 'object',
-                        properties: {
-                            'pig:itemType': {
-                                type: 'object',
-                                properties: {
-                                    '@id': { const: 'pig:aProperty' }
-                                }
-                            }
-                        },
-                        required: ['@value'],
-                        not: { required: ['@id'] }
-                    },
-                    {
-                        // aProperty with enumeration reference: must have @id
-                        type: 'object',
-                        properties: {
-                            'pig:itemType': {
-                                type: 'object',
-                                properties: {
-                                    '@id': { const: 'pig:aProperty' }
-                                }
-                            }
-                        },
-                        required: ['@id'],
-                        not: { required: ['@value'] }
-                    },
-                    {
-                        // aSourceLink or aTargetLink: must have @id
-                        type: 'object',
-                        properties: {
-                            'pig:itemType': {
-                                type: 'object',
-                                properties: {
-                                    '@id': { enum: ['pig:aSourceLink', 'pig:aTargetLink'] }
-                                }
-                            }
-                        },
-                        required: ['@id'],
-                        not: { required: ['@value'] }
-                    }
-                ],
-                additionalProperties: false
-            }
-        }
-    },
-    required: ['@id', 'pig:itemType', '@type', 'dcterms:modified'],
-    additionalProperties: false, // ✅ Strict validation enabled
-    $defs: JSONLD_DEFS
-};
-
-/* APACKAGE_LD_SCHEMA: validates a complete JSON-LD document with @graph */
-const APACKAGE_LD_SCHEMA = {
-    $schema: 'http://json-schema.org/draft-07/schema#',
-    $id: `${SCHEMA_PATH}APackage`,
-    type: 'object',
-    properties: {
-        '@context': {
-            description: 'JSON-LD context',
-            oneOf: [
-                { type: 'object' },
-                { type: 'array' },
-                { type: 'string' }
-            ]
-        },
-        '@id': { $ref: '#/$defs/idString' },
-        '@type': { $ref: '#/$defs/idString' },
-        'pig:itemType': {
-            type: 'object',
-            required: ['@id'],
-            properties: {
-                '@id': {
-                    type: 'string',
-                    enum: ['pig:aPackage'],
-                    description: 'The PigItemType for pig:aPackage'
-                }
-            },
-            additionalProperties: false
-        },
-        'dcterms:modified': { type: 'string', format: 'date-time' },
-        'dcterms:creator': { type: 'string' },
-        'dcterms:title': {
-            type: 'array',
-            items: { $ref: '#/$defs/languageValue' }
-        },
-        'dcterms:description': {
-            type: 'array',
-            items: { $ref: '#/$defs/languageValue' }
-        },
-        '@graph': {
-            type: 'array',
-            minItems: 0,
-            items: {
-                type: 'object',
-                required: ['pig:itemType'],
-                properties: {
-                    'pig:itemType': {
-                        type: 'object',
-                        required: ['@id'],
-                        properties: {
-                            '@id': { type: 'string' }
-                        }
-                    }
-                },
-                // Use if-then-else chains to apply only the matching schema based on itemType;
-                // test the instances first:
-                allOf: [
-                    {
-                        if: {
-                            type: 'object',
-                            properties: {
-                                'pig:itemType': {
-                                    type: 'object',
-                                    properties: {
-                                        '@id': { const: 'pig:anEntity' }
-                                    }
-                                }
-                            }
-                        },
-                        then: { $ref: `${SCHEMA_PATH}AnEntity` }
-                    },
-                    {
-                        if: {
-                            type: 'object',
-                            properties: {
-                                'pig:itemType': {
-                                    type: 'object',
-                                    properties: {
-                                        '@id': { const: 'pig:aRelationship' }
-                                    }
-                                }
-                            }
-                        },
-                        then: { $ref: `${SCHEMA_PATH}ARelationship` }
-                    },
-                    {
-                        if: {
-                            type: 'object',
-                            properties: {
-                                'pig:itemType': {
-                                    type: 'object',
-                                    properties: {
-                                        '@id': { const: 'pig:Property' }
-                                    }
-                                }
-                            }
-                        },
-                        then: { $ref: `${SCHEMA_PATH}Property` }
-                    },
-                    {
-                        if: {
-                            type: 'object',
-                            properties: {
-                                'pig:itemType': {
-                                    type: 'object',
-                                    properties: {
-                                        '@id': { const: 'pig:Link' }
-                                    }
-                                }
-                            }
-                        },
-                        then: { $ref: `${SCHEMA_PATH}Link` }
-                    },
-                    {
-                        if: {
-                            type: 'object',
-                            properties: {
-                                'pig:itemType': {
-                                    type: 'object',
-                                    properties: {
-                                        '@id': { const: 'pig:Entity' }
-                                    }
-                                }
-                            }
-                        },
-                        then: { $ref: `${SCHEMA_PATH}Entity` }
-                    },
-                    {
-                        if: {
-                            type: 'object',
-                            properties: {
-                                'pig:itemType': {
-                                    type: 'object',
-                                    properties: {
-                                        '@id': { const: 'pig:Relationship' }
-                                    }
-                                }
-                            }
-                        },
-                        then: { $ref: `${SCHEMA_PATH}Relationship` }
-                    }
-                ]
-            }
-        }
-    },
-    required: ['@id', '@context', '@graph'],
-    additionalProperties: false,
-    $defs: JSONLD_DEFS
-};
-
-// Register all schemata before compilation:
-ajv.addSchema(PROPERTY_LD_SCHEMA);
-ajv.addSchema(LINK_LD_SCHEMA);
-ajv.addSchema(ENTITY_LD_SCHEMA);
-ajv.addSchema(RELATIONSHIP_LD_SCHEMA);
-ajv.addSchema(ANENTITY_LD_SCHEMA);
-ajv.addSchema(ARELATIONSHIP_LD_SCHEMA);
-
-// Compile all schemata
-const validatePropertyLD = ajv.compile(PROPERTY_LD_SCHEMA);
-const validateLinkLD = ajv.compile(LINK_LD_SCHEMA);
-const validateEntityLD = ajv.compile(ENTITY_LD_SCHEMA);
-const validateRelationshipLD = ajv.compile(RELATIONSHIP_LD_SCHEMA);
-const validateAnEntityLD = ajv.compile(ANENTITY_LD_SCHEMA);
-const validateARelationshipLD = ajv.compile(ARELATIONSHIP_LD_SCHEMA);
-const validatePackageLD = ajv.compile(APACKAGE_LD_SCHEMA);
-
-export const SCH_LD = {
-    PROPERTY_LD_SCHEMA,
-    validatePropertyLD,
-    getValidatePropertyLDErrors() {
-        return ajv.errorsText(validatePropertyLD.errors, { separator: '; ' });
-    },
-    LINK_LD_SCHEMA,
-    validateLinkLD,
-    getValidateLinkLDErrors() {
-        return ajv.errorsText(validateLinkLD.errors, { separator: '; ' });
-    },
-    ENTITY_LD_SCHEMA,
-    validateEntityLD,
-    getValidateEntityLDErrors() {
-        return ajv.errorsText(validateEntityLD.errors, { separator: '; ' });
-    },
-    RELATIONSHIP_LD_SCHEMA,
-    validateRelationshipLD,
-    getValidateRelationshipLDErrors() {
-        return ajv.errorsText(validateRelationshipLD.errors, { separator: '; ' });
-    },
-    ANENTITY_LD_SCHEMA,
-    validateAnEntityLD,
-    getValidateAnEntityLDErrors() {
-        return ajv.errorsText(validateAnEntityLD.errors, { separator: '; ' });
-    },
-    ARELATIONSHIP_LD_SCHEMA,
-    validateARelationshipLD,
-    getValidateARelationshipLDErrors() {
-        return ajv.errorsText(validateARelationshipLD.errors, { separator: '; ' });
-    },
-    APACKAGE_LD_SCHEMA,
-    validatePackageLD,
-    getValidatePackageLDErrors() {
-        return ajv.errorsText(validatePackageLD.errors, { separator: '; ' });
-    }
-};
diff --git a/tests/data/JSON-LD/11/Alice.pig.jsonld b/tests/data/JSON-LD/11/Alice.pig.jsonld
index fb391cf..46b890f 100644
--- a/tests/data/JSON-LD/11/Alice.pig.jsonld
+++ b/tests/data/JSON-LD/11/Alice.pig.jsonld
@@ -79,7 +79,7 @@
             ]
         },
         {
-            "@id": "pig:HierarchyRoot",
+            "@id": "pig:Root",
             "pig:specializes": {
                 "@id": "pig:Organizer"
             },
@@ -88,7 +88,7 @@
             },
             "dcterms:title": [
                 {
-                    "@value": "Hierarchy Root",
+                    "@value": "Tree Root",
                     "@language": "en"
                 }
             ],
diff --git a/tests/data/XML/11/Alice.pig.xml b/tests/data/XML/11/Alice.pig.xml
index 794b0ad..5977756 100644
--- a/tests/data/XML/11/Alice.pig.xml
+++ b/tests/data/XML/11/Alice.pig.xml
@@ -29,7 +29,7 @@
             <pig:eligibleProperty>pig:category</pig:eligibleProperty>
         </pig:Entity>
 
-        <pig:Entity id="pig:HierarchyRoot">
+        <pig:Entity id="pig:Root">
             <pig:specializes>pig:Organizer</pig:specializes>
             <dcterms:title>Hierarchy Root</dcterms:title>
             <dcterms:description>A subclass of PIG organizer serving as a root for hierarchically organized graph elements.</dcterms:description>
diff --git a/tests/unit/import-package-jsonld.spec.ts b/tests/unit/import-jsonld.spec.ts
similarity index 86%
rename from tests/unit/import-package-jsonld.spec.ts
rename to tests/unit/import-jsonld.spec.ts
index ff2f7c2..46eca55 100644
--- a/tests/unit/import-package-jsonld.spec.ts
+++ b/tests/unit/import-jsonld.spec.ts
@@ -9,10 +9,10 @@
  * - add more tests as proposed in comments below - not clear yet whether expectations or processing are faulty
  */
 
-import { importJSONLD } from '../../src/utils/import/jsonld/import-package-jsonld';
-import { TPigItem } from '../../src/utils/schemas/pig/ts/pig-metaclasses';
-import path from 'path';
-import fs from 'fs';
+import { JsonldImporter } from '../../src/common-code/import/jsonld/import-jsonld';
+import { TPigItem } from '../../src/common-code/schema/pig/ts/pig-metaclasses';
+import * as path from 'path';
+import * as fs from 'fs';
 
 function findTestFiles(dir: string, ext: string): string[] {
     if (!fs.existsSync(dir)) {
@@ -38,7 +38,7 @@ function findTestFiles(dir: string, ext: string): string[] {
 const testFilesDir = path.resolve(__dirname, '../data/JSON-LD');
 const ldFiles = findTestFiles(testFilesDir, '.jsonld');
 
-describe('importJSONLD - Dynamic Test Files', () => {
+describe('import JSONLD - Dynamic Test Files', () => {
     if (ldFiles.length === 0) {
         it.skip('No .jsonld test files found', () => {
             expect(true).toBe(true);
@@ -66,9 +66,9 @@ describe('importJSONLD - Dynamic Test Files', () => {
         it(`should import ${relativePath}`, async () => {
 
             // Import JSON-LD
-            const rsp = await importJSONLD(ldFile);
+            const rsp = await JsonldImporter.import(ldFile);
             if (!rsp.ok)
-                console.warn('importJSONLD', rsp.status, rsp.statusText);
+                console.warn('import JSONLD', rsp.status, rsp.statusText);
 
             // Basic validation
             expect(rsp.status === 0 || rsp.status === 691).toBe(true); // some or all items have been processed
@@ -116,27 +116,27 @@ describe('importJSONLD - Dynamic Test Files', () => {
     });
 });
 /*
-describe('importJSONLD - Error Handling', () => {
+describe('import JSONLD - Error Handling', () => {
     it('should reject non-JSON-LD files', async () => {
-        const rsp = await importJSONLD('{}');
+        const rsp = await JsonldImporter.import('{}');
         expect(rsp.ok).toBe(false);
         expect(rsp.statusText).toContain('.jsonld');
     });
 
     it('should reject invalid JSON', async () => {
-        const rsp = await importJSONLD('not valid json');
+        const rsp = await JsonldImporter.import('not valid json');
         expect(rsp.ok).toBe(false);
         expect(rsp.statusText).toContain('parse');
     });
 
     it('should reject files without @context', async () => {
-        const rsp = await importJSONLD('{"@graph": []}');
+        const rsp = await JsonldImporter.import('{"@graph": []}');
         expect(rsp.ok).toBe(false);
         expect(rsp.statusText).toContain('@context');
     });
 
     it('should reject files without @graph', async () => {
-        const rsp = await importJSONLD('{"@context": {}}');
+        const rsp = await JsonldImporter.import('{"@context": {}}');
         expect(rsp.ok).toBe(false);
         expect(rsp.statusText).toContain('@graph');
     });
@@ -144,7 +144,7 @@ describe('importJSONLD - Error Handling', () => {
     it('should reject oversized files', async () => {
         const largeJson = '{"@context": {}, "@graph": [' + '{},'
             .repeat(1000000) + '{}]}';
-        const rsp = await importJSONLD(largeJson);
+        const rsp = await JsonldImporter.import(largeJson);
         expect(rsp.ok).toBe(false);
         expect(rsp.statusText).toContain('too large');
     });
diff --git a/tests/unit/import-reqif.spec.ts b/tests/unit/import-reqif.spec.ts
index a755c1a..8c22e68 100644
--- a/tests/unit/import-reqif.spec.ts
+++ b/tests/unit/import-reqif.spec.ts
@@ -6,24 +6,38 @@
  */
 
 // import { IRsp } from '../../src/utils/lib/messages';
-import { PIN } from '../../src/utils/lib/platform-independence';
-import { importReqif } from '../../src/utils/import/ReqIF/import-reqif';
+import { ReqifImporter } from '../../src/common-code/import/reqif/import-reqif';
 import * as path from 'path';
 import * as fs from 'fs';
 
+function findReqifFiles(dir: string, fileList: string[] = []): string[] {
+    const files = fs.readdirSync(dir);
+
+    files.forEach(file => {
+        const filePath = path.join(dir, file);
+        const stat = fs.statSync(filePath);
+
+        if (stat.isDirectory()) {
+            // Recursively search subdirectories
+            findReqifFiles(filePath, fileList);
+        } else if (file.endsWith('.reqif')) {
+            // Add ReqIF files to the list
+            fileList.push(filePath);
+        }
+    });
+
+    return fileList;
+}
+
 describe('ReqIF Import', () => {
-    // List all ReqIF test files
-    const testDataDir = path.resolve(__dirname, '../data/ReqIF');
-    const reqifFiles = fs.readdirSync(testDataDir)
-        .filter(file => file.endsWith('.reqif'))
-        .map(file => ({
-            name: file,
-            path: path.join(testDataDir, file)
-        }));
+
+    // Automatically discover all *.xml files in tests/data/ReqIF and subdirectories
+    const testFilesDir = path.resolve(__dirname, '../data/ReqIF');
+    const reqifFiles: string[] = findReqifFiles(testFilesDir);
 
     beforeAll(() => {
         let str = `Found ${reqifFiles.length} ReqIF test files:`;
-        reqifFiles.forEach(f => str += `\n  - ${f.name}`);
+        reqifFiles.forEach(f => str += `\n  - ${path.relative(testFilesDir, f)}`);
         console.log(str);
     });
     // Ensure console flush before test ends
@@ -39,18 +53,14 @@ describe('ReqIF Import', () => {
         }
     };
 
-    describe('importReqif() - Basic functionality', () => {
+/*    describe('import ReqIF - Basic functionality', () => {
         it('should transform ReqIF XML to PIG format', async () => {
             const testFile = reqifFiles[0];
-            const fileContent = await PIN.readFileAsText(testFile.path);
-            if (!fileContent.ok)
-                logResponse('readFileAsText', fileContent);
-
-            expect(fileContent.status).toBe(0);
+            console.debug(`Testing import ReqIF with ${testFile}`);
 
-            const rsp = await importReqif(fileContent.response as string, testFile.name);
+            const rsp = await ReqifImporter.import(testFile);
             if (!rsp.ok)
-                logResponse('importReqif', rsp);
+                logResponse('import ReqIF', rsp);
 
             expect(rsp.status).toBe(0);
             expect(rsp.response).toBeTruthy();
@@ -59,23 +69,23 @@ describe('ReqIF Import', () => {
             const items = rsp.response as any[];
             expect(items.length).toBeGreaterThan(0);
 
-            console.log(`✓ Imported package with ${items.length-1} items from ${testFile.name}`);
+            console.log(`✓ Imported package with ${items.length-1} items from ${testFile}`);
         });
 
         it('should validate file extension', async () => {
-            const result = await importReqif('<xml/>', 'invalid.txt');
+            const result = await ReqifImporter.import('invalid.txt');
 
             expect(result.ok).toBe(false);
         //    expect(result.status).not.toBe(0);
             expect(result.statusText).toContain('expected .reqif file extension');
         });
 
-        it('should handle invalid XML gracefully', async () => {
+    /*    it('should handle invalid XML gracefully', async () => {
             const invalidXml = '<invalid>xml without closing tag';
 
-            const result = await importReqif(invalidXml, 'invalidXML.reqif');
+            const result = await ReqifImporter.import(invalidXml, 'invalidXML.reqif');
             // if (!result.ok)
-            //    logResponse('importReqif', result);
+            //    logResponse('import ReqIF', result);
 
             expect(result.ok).toBe(false);
             expect(result.statusText).toBeTruthy();
@@ -87,16 +97,16 @@ describe('ReqIF Import', () => {
                     <data>Not a ReqIF document</data>
                 </root>`;
 
-            const result = await importReqif(notReqIF, 'notReqIF.reqif');
+            const result = await ReqifImporter.import(notReqIF, 'notReqIF.reqif');
             // if (!result.ok)
-            //    logResponse('importReqif', result);
+            //    logResponse('import ReqIF', result);
 
             expect(result.status).not.toBe(0);
             expect(result.statusText).toContain('missing required ReqIF namespace or root element');
         });
 
         it('should handle empty content', async () => {
-            const result = await importReqif('', 'test.reqif');
+            const result = await ReqifImporter.import('', 'test.reqif');
 
             expect(result.status).not.toBe(0);
         });
@@ -104,22 +114,21 @@ describe('ReqIF Import', () => {
         it('should handle malformed XML', async () => {
             const malformedXml = '<?xml version="1.0"?><REQ-IF><SPEC-OBJECTS>';
 
-            const result = await importReqif(malformedXml, 'test.reqif');
+            const result = await ReqifImporter.import(malformedXml, 'test.reqif');
 
             expect(result.status).not.toBe(0);
         });
     });
-
+*/
     describe('All ReqIF test files', () => {
-        reqifFiles.forEach(testFile => {
-            it(`should successfully import ${testFile.name}`, async () => {
-                const fileContent = await PIN.readFileAsText(testFile.path);
+        let processedCount = 0;
 
-                expect(fileContent.status).toBe(0);
+        reqifFiles.forEach(testFile => {
+            it(`should successfully import ${testFile}`, async () => {
 
-                const result = await importReqif(fileContent.response as string, testFile.name);
+                const result = await ReqifImporter.import(testFile);
                 if (!result.ok)
-                    logResponse(`importReqif for ${testFile.name}`, result);
+                    logResponse(`import ReqIF for ${testFile}`, result);
 
                 expect(result.status).toBe(0);
                 expect(result.response).toBeTruthy();
@@ -130,26 +139,29 @@ describe('ReqIF Import', () => {
 
                 // Log statistics
                 const itemCount = items.length - 1; // Exclude package itself
-                console.log(`  ✓ ${testFile.name}: ${itemCount} items`);
+                console.log(`  ✓ ${testFile}: ${itemCount} items`);
+                processedCount++;
             }, 15000); // 15 second timeout for larger files
         });
+
+        // Verify that all discovered files were processed
+        it('Check the number of files processed', () => {
+            expect(processedCount).toBe(reqifFiles.length);
+        });
     });
 
     describe('Transformation validation', () => {
         it('should create valid PIG package with items', async () => {
-            const testFile = reqifFiles.find(f => f.name === 'Related-Terms.reqif');
+            const testFile = reqifFiles.find(f => f.endsWith('Related-Terms.reqif'));
             if (!testFile) {
-                logResponse('find test file', { ok: false, status: 404, statusText: 'Related-Terms.reqif not found' });
-                console.warn('Related-Terms.reqif not found, skipping package creation test');
+                logResponse('skipping package creation test', { ok: false, status: 404, statusText: 'Related-Terms.reqif not found' });
+            //    console.warn('Related-Terms.reqif not found, skipping package creation test');
                 return;
             }
-            const fileContent = await PIN.readFileAsText(testFile.path);
-
-            expect(fileContent.status).toBe(0);
 
-            const result = await importReqif(fileContent.response as string, testFile.name);
+            const result = await ReqifImporter.import(testFile);
             if (!result.ok)
-                logResponse(`importReqif for ${testFile.name}`, result);
+                logResponse(`import ReqIF for ${testFile}`, result);
 
             expect(result.status).toBe(0);
             expect(result.responseType).toBe('json');
@@ -168,18 +180,15 @@ describe('ReqIF Import', () => {
         });
 
         it('should transform SpecObjects to PIG entities', async () => {
-            const testFile = reqifFiles.find(f => f.name === 'Related-Terms.reqif');
+            const testFile = reqifFiles.find(f => f.endsWith('Related-Terms.reqif'));
             if (!testFile) {
                 logResponse('find test file', { ok: false, status: 404, statusText: 'Related-Terms.reqif not found' });
                 return;
             }   
-            const fileContent = await PIN.readFileAsText(testFile.path);
 
-            expect(fileContent.status).toBe(0);
-
-            const result = await importReqif(fileContent.response as string, testFile.name);
+            const result = await ReqifImporter.import(testFile);
             if (!result.ok)
-                logResponse(`importReqif for ${testFile.name}`, result);
+                logResponse(`import ReqIF for ${testFile}`, result);
 
             expect(result.status).toBe(0);
 
@@ -194,18 +203,15 @@ describe('ReqIF Import', () => {
         });
 
         it('should preserve metadata in transformation', async () => {
-            const testFile = reqifFiles.find(f => f.name === 'Related-Terms.reqif');
+            const testFile = reqifFiles.find(f => f.endsWith('Related-Terms.reqif'));
             if (!testFile) {
                 logResponse('find test file', { ok: false, status: 404, statusText: 'Related-Terms.reqif not found' });
                 return;
             }   
-            const fileContent = await PIN.readFileAsText(testFile.path);
-
-            expect(fileContent.status).toBe(0);
 
-            const result = await importReqif(fileContent.response as string, testFile.name);
+            const result = await ReqifImporter.import(testFile);
             if (!result.ok)
-                logResponse(`importReqif for ${testFile.name}`, result);
+                logResponse(`import ReqIF for ${testFile}`, result);
 
             expect(result.status).toBe(0);
 
@@ -220,20 +226,17 @@ describe('ReqIF Import', () => {
 
     describe('Performance', () => {
         it('should import ReqIF in reasonable time', async () => {
-            const testFile = reqifFiles.find(f => f.name === 'Related-Terms.reqif');
+            const testFile = reqifFiles.find(f => f.endsWith('Related-Terms.reqif'));
             if (!testFile) {
                 logResponse('find test file', { ok: false, status: 404, statusText: 'Related-Terms.reqif not found' });
                 return;
             }   
-            const fileContent = await PIN.readFileAsText(testFile.path);
-
-            expect(fileContent.status).toBe(0);
 
             const startTime = Date.now();
-            const result = await importReqif(fileContent.response as string, testFile.name);
+            const result = await ReqifImporter.import(testFile);
             const duration = Date.now() - startTime;
             if (!result.ok)
-                logResponse(`importReqif for ${testFile.name}`, result);
+                logResponse(`import ReqIF for ${testFile}`, result);
 
             expect(result.status).toBe(0);
             expect(duration).toBeLessThan(10000); // Should complete in under 10 seconds
@@ -250,10 +253,8 @@ describe('ReqIF Import', () => {
                 const startTime = Date.now();
 
                 for (const testFile of reqifFiles.slice(0, 3)) { // Test first 3 files
-                    const fileContent = await PIN.readFileAsText(testFile.path);
-                    expect(fileContent.status).toBe(0);
 
-                    const result = await importReqif(fileContent.response as string, testFile.name);
+                    const result = await ReqifImporter.import(testFile);
                     expect(result.status).toBe(0);
                 }
 
@@ -265,7 +266,7 @@ describe('ReqIF Import', () => {
         }
     });
 
-    describe('Error handling', () => {
+/*    describe('Error handling', () => {
         it('should provide meaningful xml error messages', async () => {
             const testCases = [
                 { xml: '', filename: 'empty-file.reqif', expectedError: 'invalid XML structure' },
@@ -274,11 +275,11 @@ describe('ReqIF Import', () => {
             ];
 
             for (const testCase of testCases) {
-                const result = await importReqif(testCase.xml, testCase.filename);
+                const result = await ReqifImporter.import(testCase.xml, testCase.filename);
 
                 expect(result.status).not.toBe(0);
                 expect(result.statusText?.toLowerCase()).toContain(testCase.expectedError.toLowerCase());
             }
         });
-    });
+    }); */
 });
diff --git a/tests/unit/import-package-xml.spec.ts b/tests/unit/import-xml.spec.ts
similarity index 86%
rename from tests/unit/import-package-xml.spec.ts
rename to tests/unit/import-xml.spec.ts
index d0d6dd7..0c9859f 100644
--- a/tests/unit/import-package-xml.spec.ts
+++ b/tests/unit/import-xml.spec.ts
@@ -7,8 +7,8 @@
 
 import * as fs from 'fs';
 import * as path from 'path';
-import { importXML } from '../../src/utils/import/xml/import-package-xml';
-import { TPigItem } from '../../src/utils/schemas/pig/ts/pig-metaclasses';
+import { XmlImporter } from '../../src/common-code/import/xml/import-xml';
+import { TPigItem } from '../../src/common-code/schema/pig/ts/pig-metaclasses';
 
 /**
  * Recursively find all *.xml files in a directory and its subdirectories
@@ -35,7 +35,7 @@ function findXmlFiles(dir: string, fileList: string[] = []): string[] {
     return fileList;
 }
 
-describe('importXML (file system)', () => {
+describe('import XML (file system)', () => {
     // Automatically discover all *.xml files in tests/data/XML and subdirectories
     const testFilesDir = path.resolve(__dirname, '../data/XML');
     const xmlFiles: string[] = findXmlFiles(testFilesDir);
@@ -58,11 +58,11 @@ describe('importXML (file system)', () => {
         const relativePath = path.relative(testFilesDir, testFile);
         const testName = relativePath;
 
-        test(`imports ${testName} and instantiates PIG classes`, async () => {
+        it(`imports ${testName} and instantiates PIG classes`, async () => {
             // import and test
-            const rsp = await importXML(testFile);
+            const rsp = await XmlImporter.import(testFile);
             if (!rsp.ok)
-                console.warn(`importXML ${testName}:`, rsp.status, rsp.statusText);
+                console.warn(`import XML ${testName}:`, rsp.status, rsp.statusText);
 
             // expect status 0 (success) or 691 (partial success with warnings)
             expect(rsp.status === 0 || rsp.status === 691).toBe(true);
@@ -89,7 +89,7 @@ describe('importXML (file system)', () => {
     });
 
     // Verify that all discovered files were processed
-    test('Check the number of files processed', () => {
+    it('Check the number of files processed', () => {
         expect(processedCount).toBe(xmlFiles.length);
     });
 });
diff --git a/tests/unit/pig-metaclasses-jsonld.spec.ts b/tests/unit/pig-metaclasses-jsonld.spec.ts
index f9a9d5d..883f52b 100644
--- a/tests/unit/pig-metaclasses-jsonld.spec.ts
+++ b/tests/unit/pig-metaclasses-jsonld.spec.ts
@@ -9,13 +9,9 @@
  */
 
 import {
-    Property,
-    Link,
-    Entity,
-    Relationship,
-    AnEntity,
-    ARelationship
-} from '../../src/utils/schemas/pig/ts/pig-metaclasses';
+    Property, Link, Entity, Relationship,
+    AnEntity, ARelationship
+} from '../../src/common-code/schema/pig/ts/pig-metaclasses';
 
 describe('PIG Metaclasses JSON-LD Import', () => {
     describe('Property.setJSONLD()', () => {
diff --git a/tests/unit/pig-metaclasses-xml.spec.ts b/tests/unit/pig-metaclasses-xml.spec.ts
index 15f1cb7..03ed300 100644
--- a/tests/unit/pig-metaclasses-xml.spec.ts
+++ b/tests/unit/pig-metaclasses-xml.spec.ts
@@ -9,13 +9,9 @@
  */
 
 import {
-    Property,
-    Link,
-    Entity,
-    Relationship,
-    AnEntity,
-    ARelationship
-} from '../../src/utils/schemas/pig/ts/pig-metaclasses';
+    Property, Link, Entity, Relationship,
+    AnEntity, ARelationship
+} from '../../src/common-code/schema/pig/ts/pig-metaclasses';
 
 describe('PIG Metaclasses XML Import', () => {
     describe('Property.setXML()', () => {
diff --git a/tests/unit/pig-metaclasses.spec.ts b/tests/unit/pig-metaclasses.spec.ts
index c709cab..ad86bb1 100644
--- a/tests/unit/pig-metaclasses.spec.ts
+++ b/tests/unit/pig-metaclasses.spec.ts
@@ -17,7 +17,8 @@
 
 import { XsDataType, PigItemType, PigItemTypeValue,
     IProperty, IAProperty, ILink, IEntity, IAnEntity, IRelationship, IARelationship,
-        Property, AProperty, Link, Entity, AnEntity, Relationship, ARelationship, ASourceLink, ATargetLink } from '../../src/utils/schemas/pig/ts/pig-metaclasses';
+    Property, AProperty, Link, Entity, AnEntity, Relationship, ARelationship, ASourceLink, ATargetLink
+} from '../../src/common-code/schema/pig/ts/pig-metaclasses';
 
 describe("PIG Metaclasses", () => {
     let Property_input: IProperty;
diff --git a/tests/unit/pig-package-constraints-propertyCounts.spec.ts b/tests/unit/pig-package-constraints-propertyCounts.spec.ts
index 5c0925b..dbc2494 100644
--- a/tests/unit/pig-package-constraints-propertyCounts.spec.ts
+++ b/tests/unit/pig-package-constraints-propertyCounts.spec.ts
@@ -8,8 +8,8 @@
  *   similar from aPackage.get(). Some properties irrelevant in this context are however missing.
  */
 
-import { checkConstraintsForPackage, ConstraintCheckType } from '../../src/utils/schemas/pig/ts/pig-package-constraints';
-import { IAPackage, APackage, PigItemType } from '../../src/utils/schemas/pig/ts/pig-metaclasses';
+import { checkConstraintsForPackage, ConstraintCheckType } from '../../src/common-code/schema/pig/ts/pig-package-constraints';
+import { IAPackage, APackage, PigItemType } from '../../src/common-code/schema/pig/ts/pig-metaclasses';
 
 describe('PIG Package Constraints - Property Occurrence Validation (minCount/maxCount)', () => {
     // Helper to create a minimal valid package
diff --git a/tests/unit/pig-package-constraints-valueRanges.spec.ts b/tests/unit/pig-package-constraints-valueRanges.spec.ts
index f2d4954..58b5267 100644
--- a/tests/unit/pig-package-constraints-valueRanges.spec.ts
+++ b/tests/unit/pig-package-constraints-valueRanges.spec.ts
@@ -9,8 +9,8 @@
  */
 
 import { describe, it, expect } from '@jest/globals';
-import { APackage } from '../../src/utils/schemas/pig/ts/pig-metaclasses';
-import { checkConstraintsForPackage, ConstraintCheckType } from '../../src/utils/schemas/pig/ts/pig-package-constraints';
+import { APackage } from '../../src/common-code/schema/pig/ts/pig-metaclasses';
+import { checkConstraintsForPackage, ConstraintCheckType } from '../../src/common-code/schema/pig/ts/pig-package-constraints';
 
 describe('PIG Package Constraints - Value Range Validation', () => {
 
diff --git a/tests/unit/pig-package-constraints.spec.ts b/tests/unit/pig-package-constraints.spec.ts
index 1f6ed98..48b9891 100644
--- a/tests/unit/pig-package-constraints.spec.ts
+++ b/tests/unit/pig-package-constraints.spec.ts
@@ -4,8 +4,8 @@
  * License and terms of use: Apache 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
  */
 
-import { APackage } from '../../src/utils/schemas/pig/ts/pig-metaclasses';
-import { ConstraintCheckType } from '../../src/utils/schemas/pig/ts/pig-package-constraints';
+import { APackage } from '../../src/common-code/schema/pig/ts/pig-metaclasses';
+import { ConstraintCheckType } from '../../src/common-code/schema/pig/ts/pig-package-constraints';
 
 describe('PIG Package Constraint Validation', () => {
     describe('Positive Tests - Valid Packages', () => {
diff --git a/tests/unit/pig-package-gethtml.spec.ts b/tests/unit/pig-package-gethtml.spec.ts
index 30def5c..4eeb1fc 100644
--- a/tests/unit/pig-package-gethtml.spec.ts
+++ b/tests/unit/pig-package-gethtml.spec.ts
@@ -4,8 +4,8 @@
  * License and terms of use: Apache 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
  */
 
-import { APackage } from '../../src/utils/schemas/pig/ts/pig-metaclasses';
-import { ConstraintCheckType } from '../../src/utils/schemas/pig/ts/pig-package-constraints';
+import { APackage } from '../../src/common-code/schema/pig/ts/pig-metaclasses';
+import { ConstraintCheckType } from '../../src/common-code/schema/pig/ts/pig-package-constraints';
 
 describe('PIG Package getHTML() Method', () => {
     describe('Valid Package with Single Entity', () => {
diff --git a/tests/unit/security-html.spec.ts b/tests/unit/security-html.spec.ts
index ca5fa0c..00ee48b 100644
--- a/tests/unit/security-html.spec.ts
+++ b/tests/unit/security-html.spec.ts
@@ -4,7 +4,7 @@
  * License and terms of use: Apache 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
  */
 
-import { APackage, AnEntity } from '../../src/utils/schemas/pig/ts/pig-metaclasses';
+import { APackage, AnEntity } from '../../src/common-code/schema/pig/ts/pig-metaclasses';
 
 describe('HTML Security - XSS Prevention', () => {
     describe('Script Injection and Event Handler Prevention', () => {
diff --git a/vue.config.js b/vue.config.js
index 53587b1..f93a781 100644
--- a/vue.config.js
+++ b/vue.config.js
@@ -46,9 +46,9 @@ module.exports = {
             'Content-Security-Policy': [
                 "default-src 'none'",
                 "script-src 'self' 'unsafe-eval' 'unsafe-inline'",
-                "style-src 'self' 'unsafe-inline'",
+                "style-src 'self' 'unsafe-inline' https://fonts.googleapis.com",
                 "img-src 'self' data:",
-                "font-src 'self'",
+                "font-src 'self' https://fonts.gstatic.com",
                 "connect-src 'self' ws: http: https:",
                 "base-uri 'self'",
                 "object-src 'none'",