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README.md

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+---
+license: cc-by-4.0
+language:
+  - en
+pretty_name: MoDiP Plastics Knowledge Graph
+tags:
+  - collections-as-data
+  - cultural-heritage
+  - GLAM
+  - CIDOC-CRM
+  - SKOS
+  - getty-aat
+  - knowledge-graph
+  - plastics
+  - ontology
+  - linked-data
+size_categories:
+  - 100K<n<1M
+task_categories:
+  - graph-ml
+  - other
+source_datasets:
+  - Museum Data Service (MoDiP)
+configs:
+  - config_name: default
+    data_files:
+      - split: objects
+        path: data/raw/modip_records.json.gz
+---
+
+# MoDiP Plastics Knowledge Graph
+
+A standards-based knowledge graph built from the full open catalogue of the
+**Museum of Design in Plastics** (MoDiP, Arts University Bournemouth) — the UK's
+only accredited museum devoted to plastics in design — as a worked example of
+turning a small museum's raw "collections as data" into something computable.
+
+- **11,865** object records (the complete MoDiP set), retrieved from the
+  [Museum Data Service](https://museumdata.uk/) under **CC BY 4.0**.
+- **485,013-triple** CIDOC-CRM (Linked Art compatible) instance graph.
+- **137-concept** SKOS materials taxonomy grounded in polymer science
+  (thermoplastic / thermoset / elastomer / biopolymer), resolving **99.9%** of
+  35,172 free-text material assertions and unifying abbreviation / full-name /
+  trade-name synonyms (PP = polypropylene; Perspex → PMMA; Bakelite → phenol
+  formaldehyde).
+- **55** verified `skos:exactMatch` links to the **Getty Art & Architecture
+  Thesaurus** (query-reconciled, exact-label only).
+- **289** object-to-object variant / same-mould edges recovered from accession
+  numbers written into free-text descriptions.
+- Release gate: **SHACL `conforms=True`** + closed-world vocabulary check with
+  **0** dangling concept references.
+
+## Files
+
+| Path | Content |
+|---|---|
+| `data/raw/modip_records.json.gz` | the raw MoDiP records as fetched (gzipped) |
+| `ontology/materials.ttl` | SKOS materials taxonomy (137 concepts, AAT-aligned) |
+| `ontology/processes.ttl`, `ontology/domains.ttl` | process & use-domain taxonomies |
+| `build/modip-crm.ttl.gz` | the CIDOC-CRM instance graph (gzipped Turtle) |
+| `build/dag_variants.ttl` / `.csv` | the variant graph |
+| `docs/spectrum-crm-mapping.md` | the Spectrum → CIDOC-CRM crosswalk |
+| `BUILD_REPORT.md` | exactly what was fetched, computed and could not be obtained |
+
+## Standards & modelling
+
+No bespoke class ontology is minted. Instances use **CIDOC-CRM** (ISO 21127);
+vocabularies use **SKOS**; materials align to **Getty AAT**; source records are
+**Spectrum**. Only concept and instance URIs are local, plus two clearly-marked
+polymer-science facet properties (`thermalBehaviour`, `origin`). See the
+[Spectrum→CRM mapping](docs/spectrum-crm-mapping.md).
+
+## Licence & attribution
+
+- **Source records** © Museum of Design in Plastics / Arts University Bournemouth,
+  published via the Museum Data Service under
+  [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/). Per-record rights are
+  retained in the graph (`dct:license`, `dct:rightsHolder`).
+- **This transformation** (taxonomies, mappings, graph) is released under CC BY 4.0.
+- **Getty AAT** alignments © J. Paul Getty Trust (ODC-By 1.0).
+- Endorsed by neither MoDiP nor the Museum Data Service.
+
+## Provenance & reproduction
+
+Full pipeline and honesty log in the companion repository:
+[github.com/fabio-rovai/open-ontologies → case-studies/modip-plastics-kg](https://github.com/fabio-rovai/open-ontologies/tree/main/case-studies/modip-plastics-kg).
+`run_all.sh` regenerates and revalidates the whole graph from the committed data.
+
+Built by [The Tesseract Academy](https://tesseract.academy). If you run or fund a
+collection and want your catalogue made this queryable:
+**fabio@thetesseractacademy.com**.