feat: implement PLEXOS solution reader and setup master files for 9-12 versions

.gitignore

@@ -13,7 +13,6 @@
 *.sdf
 *.tax2010
 *.vcf
-*.xml
 
 ### Database ###
 *.accdb
@@ -315,6 +314,7 @@ Sessionx.vim
 [._]*.un~
 
 ### VisualStudioCode ###
+.vscode
 .vscode/*
 !.vscode/settings.json
 !.vscode/tasks.json

CHANGELOG.md

@@ -36,38 +36,61 @@ All notable changes to this project will be documented in this file.
 
 ## [1.3.4](https://github.com/NatLabRockies/plexosdb/compare/v1.3.3...v1.3.4) (2026-03-27)
 
-
 ### 🧩 CI
 
-* use release/v1 tag for pypa/gh-action-pypi-publish ([#107](https://github.com/NatLabRockies/plexosdb/issues/107)) ([c4e58b8](https://github.com/NatLabRockies/plexosdb/commit/c4e58b8dc062f3302216b3caa7c9c6c1cc423c86))
-
+- use release/v1 tag for pypa/gh-action-pypi-publish
+  ([#107](https://github.com/NatLabRockies/plexosdb/issues/107))
+  ([c4e58b8](https://github.com/NatLabRockies/plexosdb/commit/c4e58b8dc062f3302216b3caa7c9c6c1cc423c86))
 
 ### 📦 Build
 
-* **deps:** bump actions/cache from 5.0.3 to 5.0.4 ([#115](https://github.com/NatLabRockies/plexosdb/issues/115)) ([1ff162a](https://github.com/NatLabRockies/plexosdb/commit/1ff162afe66dfe3bcad7d0dbb0a534b4a9d3374a))
-* **deps:** bump astral-sh/setup-uv from 7.5.0 to 7.6.0 ([#117](https://github.com/NatLabRockies/plexosdb/issues/117)) ([13fb3cf](https://github.com/NatLabRockies/plexosdb/commit/13fb3cfb4c7a2affd7df504a2e152c9a2b0c1295))
-* **deps:** bump astral-sh/setup-uv from b75dde52aef63a238519e7aecbbe79a4a52e4315 to e06108dd0aef18192324c70427afc47652e63a82 ([#114](https://github.com/NatLabRockies/plexosdb/issues/114)) ([96f3975](https://github.com/NatLabRockies/plexosdb/commit/96f397540b06e68e45075a5d700d2b0a91ebe112))
-* **deps:** bump codecov/codecov-action from 5.5.2 to 5.5.3 ([#116](https://github.com/NatLabRockies/plexosdb/issues/116)) ([c86c8e2](https://github.com/NatLabRockies/plexosdb/commit/c86c8e254a85909043c8a7b25a10ff7d169d1e02))
-* **deps:** bump googleapis/release-please-action from c3fc4de07084f75a2b61a5b933069bda6edf3d5c to 16a9c90856f42705d54a6fda1823352bdc62cf38 ([#112](https://github.com/NatLabRockies/plexosdb/issues/112)) ([4150d56](https://github.com/NatLabRockies/plexosdb/commit/4150d56065f41cf916912daf9cda39281cf4e3df))
-* **deps:** bump peaceiris/actions-gh-pages from e9c66a37f080288a11235e32cbe2dc5fb3a679cc to 4f9cc6602d3f66b9c108549d475ec49e8ef4d45e ([#113](https://github.com/NatLabRockies/plexosdb/issues/113)) ([c697f1d](https://github.com/NatLabRockies/plexosdb/commit/c697f1d7642dac4c16cd5ea9e11e327d684ff548))
+- **deps:** bump actions/cache from 5.0.3 to 5.0.4
+  ([#115](https://github.com/NatLabRockies/plexosdb/issues/115))
+  ([1ff162a](https://github.com/NatLabRockies/plexosdb/commit/1ff162afe66dfe3bcad7d0dbb0a534b4a9d3374a))
+- **deps:** bump astral-sh/setup-uv from 7.5.0 to 7.6.0
+  ([#117](https://github.com/NatLabRockies/plexosdb/issues/117))
+  ([13fb3cf](https://github.com/NatLabRockies/plexosdb/commit/13fb3cfb4c7a2affd7df504a2e152c9a2b0c1295))
+- **deps:** bump astral-sh/setup-uv from
+  b75dde52aef63a238519e7aecbbe79a4a52e4315 to
+  e06108dd0aef18192324c70427afc47652e63a82
+  ([#114](https://github.com/NatLabRockies/plexosdb/issues/114))
+  ([96f3975](https://github.com/NatLabRockies/plexosdb/commit/96f397540b06e68e45075a5d700d2b0a91ebe112))
+- **deps:** bump codecov/codecov-action from 5.5.2 to 5.5.3
+  ([#116](https://github.com/NatLabRockies/plexosdb/issues/116))
+  ([c86c8e2](https://github.com/NatLabRockies/plexosdb/commit/c86c8e254a85909043c8a7b25a10ff7d169d1e02))
+- **deps:** bump googleapis/release-please-action from
+  c3fc4de07084f75a2b61a5b933069bda6edf3d5c to
+  16a9c90856f42705d54a6fda1823352bdc62cf38
+  ([#112](https://github.com/NatLabRockies/plexosdb/issues/112))
+  ([4150d56](https://github.com/NatLabRockies/plexosdb/commit/4150d56065f41cf916912daf9cda39281cf4e3df))
+- **deps:** bump peaceiris/actions-gh-pages from
+  e9c66a37f080288a11235e32cbe2dc5fb3a679cc to
+  4f9cc6602d3f66b9c108549d475ec49e8ef4d45e
+  ([#113](https://github.com/NatLabRockies/plexosdb/issues/113))
+  ([c697f1d](https://github.com/NatLabRockies/plexosdb/commit/c697f1d7642dac4c16cd5ea9e11e327d684ff548))
 
 ## [1.3.3](https://github.com/NatLabRockies/plexosdb/compare/v1.3.2...v1.3.3) (2026-03-16)
 
-
 ### 🐛 Bug Fixes
 
-* **ci:** harden all workflows per zizmor audit ([#105](https://github.com/NatLabRockies/plexosdb/issues/105)) ([67ca845](https://github.com/NatLabRockies/plexosdb/commit/67ca84584d1e66410dc66b014a9b710a24b00b95))
-
+- **ci:** harden all workflows per zizmor audit
+  ([#105](https://github.com/NatLabRockies/plexosdb/issues/105))
+  ([67ca845](https://github.com/NatLabRockies/plexosdb/commit/67ca84584d1e66410dc66b014a9b710a24b00b95))
 
 ### ⚡ Performance
 
-* Improving performance of adding memberships from records ([#104](https://github.com/NatLabRockies/plexosdb/issues/104)) ([1ea4a39](https://github.com/NatLabRockies/plexosdb/commit/1ea4a39612a1bef1a0f290eaeb40441874a2b8f0))
-
+- Improving performance of adding memberships from records
+  ([#104](https://github.com/NatLabRockies/plexosdb/issues/104))
+  ([1ea4a39](https://github.com/NatLabRockies/plexosdb/commit/1ea4a39612a1bef1a0f290eaeb40441874a2b8f0))
 
 ### 📦 Build
 
-* **deps:** bump actions/download-artifact from 7 to 8 ([#101](https://github.com/NatLabRockies/plexosdb/issues/101)) ([0e572a0](https://github.com/NatLabRockies/plexosdb/commit/0e572a07a930f6e25f196e98fc879f65f7dd9daa))
-* **deps:** bump actions/upload-artifact from 6 to 7 ([#102](https://github.com/NatLabRockies/plexosdb/issues/102)) ([22b8374](https://github.com/NatLabRockies/plexosdb/commit/22b8374aa7ed9d29eb36258a6a5ad16feb2e21c5))
+- **deps:** bump actions/download-artifact from 7 to 8
+  ([#101](https://github.com/NatLabRockies/plexosdb/issues/101))
+  ([0e572a0](https://github.com/NatLabRockies/plexosdb/commit/0e572a07a930f6e25f196e98fc879f65f7dd9daa))
+- **deps:** bump actions/upload-artifact from 6 to 7
+  ([#102](https://github.com/NatLabRockies/plexosdb/issues/102))
+  ([22b8374](https://github.com/NatLabRockies/plexosdb/commit/22b8374aa7ed9d29eb36258a6a5ad16feb2e21c5))
 
 ## [1.3.2](https://github.com/NatLabRockies/plexosdb/compare/v1.3.1...v1.3.2) (2026-02-12)
 

README.md

@@ -56,11 +56,57 @@ db.add_membership(
 db.to_xml("modified_model.xml")
 ```
 
+## Versioned Schema Initialization
+
+When creating a brand-new database (not importing XML), you can preload the
+matching PLEXOS master template by version:
+
+```python
+from plexosdb import PlexosDB
+
+db = PlexosDB()
+db.create_schema(version=10)
+```
+
+Supported versions: 9, 10, 11, 12.
+
+Accepted inputs include integers, strings, and tuples. For example:
+
+```python
+db.create_schema(version="v11.0R4")
+db.create_schema(version=(12, 0, 3))
+```
+
+## Read PLEXOS Solution ZIP Tables with pandas
+
+```python
+from plexosdb import PLEXOS2SQLite
+import pandas as pd
+
+PLEXOS_SOLUTION = "/path/to/solution.zip"
+
+client = PLEXOS2SQLite(PLEXOS_SOLUTION, force=True, materialize_on_enter=False)
+client.convert()
+
+table = "ST__Interval__Regions__Fixed_Load"
+with client as db:
+    db.materialize_table(table, schema="report")
+    df_table = pd.read_sql_query(f'SELECT * FROM report."{table}"', db.connection)
+```
+
+This pattern is useful when you only need a few report/data tables from a large
+solution ZIP, because it materializes tables on demand.
+
 ## Documentation
 
 Full documentation is available at
 [natlabrockies.github.io/plexosdb](https://natlabrockies.github.io/plexosdb/).
 
+## Related Work
+
+For related previous/current work on querying PLEXOS outputs with DuckDB, see
+[plexos2duckdb](https://github.com/NatLabRockies/plexos2duckdb).
+
 ## Developer Setup
 
 plexosdb uses [uv](https://docs.astral.sh/uv/) for dependency management.

docs/source/howtos/create_db.md

@@ -12,6 +12,67 @@ from plexosdb import PlexosDB
 db = PlexosDB.from_xml("/path/to/model.xml")
 ```
 
+When using `from_xml(...)`, the schema is created automatically from the XML
+content and metadata in that file.
+
+## Create a New Empty Database with a Versioned Master Template
+
+When starting from an empty database (instead of an existing XML), you can now
+preload the versioned master template during schema creation.
+
+```python
+from plexosdb import PlexosDB
+
+db_base = PlexosDB()
+
+# Load default SQL schema + master template for PLEXOS v10
+ok = db_base.create_schema(version=10)
+assert ok
+```
+
+`create_schema(...)` returns a boolean status. It does not return a new
+`PlexosDB` instance.
+
+You can also pass custom SQL with `schema=...`:
+
+```python
+custom_schema = """
+CREATE TABLE IF NOT EXISTS my_table (
+	id INTEGER PRIMARY KEY,
+	name TEXT
+);
+"""
+
+db_custom = PlexosDB()
+db_custom.create_schema(schema=custom_schema)
+```
+
+Supported template versions are:
+
+- 9
+- 10
+- 11
+- 12
+
+Accepted version input formats include:
+
+- `10`
+- `"10.0"`
+- `"v10.0R2"`
+- `(10, 0, 2)`
+
+```python
+# Equivalent examples
+db_base.create_schema(version="v11.0R4")
+db_base.create_schema(version=(12, 0, 3))
+```
+
+If `version` is omitted, only the SQL schema is created (no master template is
+imported).
+
+Call `create_schema(...)` once per database instance. If the schema already
+exists, re-running schema SQL is skipped.
+
 ## Create empty schema (tables only)
 
 `create_schema()` by itself creates the table structure and config rows, but it
@@ -30,18 +91,6 @@ db = PlexosDB()
 db.create_schema()
 ```
 
-## Set schema version explicitly
-
-Use `version="..."` when your schema includes a `t_config` row for `Version` and
-you want to update that value during schema creation.
-
-```python
-from plexosdb import PlexosDB
-
-db = PlexosDB()
-db.create_schema(version="11.0")
-```
-
 ## Create empty schema and seed defaults
 
 Use `seed_defaults=True` when you want a fresh DB that can immediately add
@@ -102,7 +151,4 @@ VALUES (1, 'System', 1, 1, '00000000-0000-0000-0000-000000000001', 'Default syst
 
 db = PlexosDB()
 db.create_schema(schema=schema)
-
-# If your custom schema does not provide Version, you can still set it here:
-# db.create_schema(schema=schema, version="10.0")
 ```

docs/source/howtos/import_export.md

@@ -18,6 +18,36 @@ version = db.version
 print(f"Imported PLEXOS model version: {version}")
 ```
 
+## Importing a PLEXOS solution ZIP and reading report tables
+
+Use `PLEXOS2SQLite` when you want to analyze PLEXOS solution ZIP outputs. With
+`materialize_on_enter=False`, you can materialize only the table you need.
+
+```python
+from plexosdb import PLEXOS2SQLite
+import pandas as pd
+
+PLEXOS_SOLUTION = "/path/to/solution.zip"
+
+client = PLEXOS2SQLite(PLEXOS_SOLUTION, force=True, materialize_on_enter=False)
+client.convert()
+
+table = "ST__Interval__Regions__Fixed_Load"
+with client as db:
+    db.materialize_table(table, schema="report")
+    df_table = pd.read_sql_query(f'SELECT * FROM report."{table}"', db.connection)
+```
+
+How to use this flow:
+
+1. Create a `PLEXOS2SQLite` client with `materialize_on_enter=False` to avoid
+   materializing every derived solution table.
+2. Call `convert()` once to create the SQLite database from the solution ZIP.
+3. Inside `with client as db:`, call `materialize_table(..., schema="report")`
+   for the table you want.
+4. Read that table with pandas using `pd.read_sql_query(...)` and
+   `db.connection`.
+
 ## Exporting to XML
 
 Export your database to a PLEXOS-compatible XML file:

docs/source/tutorial.md

@@ -32,8 +32,27 @@ from plexosdb import PlexosDB
 # Create a new in-memory database
 db = PlexosDB()
 
-# Initialize schema + minimal defaults for object workflows
-db.create_schema(seed_defaults=True)
+# Initialize with the built-in default schema
+ok = db.create_schema()
+assert ok
+
+# Option A: initialize schema + minimal defaults for object workflows
+db_seeded = PlexosDB()
+db_seeded.create_schema(seed_defaults=True)
+
+# Option B: initialize using your own SQL schema text
+custom_schema = """
+CREATE TABLE IF NOT EXISTS my_table (
+    id INTEGER PRIMARY KEY,
+    name TEXT
+);
+"""
+db_custom = PlexosDB()
+db_custom.create_schema(schema=custom_schema)
+
+# Option C: initialize and seed from a versioned master template
+db_versioned = PlexosDB()
+db_versioned.create_schema(version=10)
 ```
 
 This creates an in-memory database with the PLEXOS schema and minimal lookup
@@ -121,6 +140,18 @@ db.create_schema(schema=schema)
 # The schema string can be as small or as complete as your workflow requires.
 ```
 
+If you want to preload a PLEXOS master template while creating the schema, pass
+the major version (supported: 9, 10, 11, 12):
+
+```python
+db_base = PlexosDB()
+db = db_base.create_schema(version=10)
+```
+
+You can also pass string or tuple formats such as `"v10.0R2"` or `(11, 0, 4)`.
+`create_schema(...)` returns a boolean status; it does not return a new database
+instance.
+
 ## Working with Objects
 
 Objects represent entities in your energy model such as generators, nodes, and

src/plexosdb/__init__.py

@@ -7,6 +7,7 @@
 from .db import PlexosDB, PropertyRecord
 from .db_manager import SQLiteManager
 from .enums import ClassEnum, CollectionEnum
+from .solution_reader import PLEXOS2SQLite, plexos_to_sqlite
 from .xml_handler import XMLHandler
 
 __version__ = version("plexosdb")
@@ -16,8 +17,10 @@
 __all__ = (
     "ClassEnum",
     "CollectionEnum",
+    "PLEXOS2SQLite",
     "PlexosDB",
     "PropertyRecord",
     "SQLiteManager",
     "XMLHandler",
+    "plexos_to_sqlite",
 )