OPDA Knowledge Base
Seven workstreams for the Property Data Trust Framework — from the governance that makes the standard authoritative to the implementation guides that get you building today.
Strategy
Why OPDA exists, the UK Industrial Strategy backdrop, the three programme phases (Sandbox → Live → National) and the live project roadmap.
- Project roadmap
- Programme phases
- UK Industrial Strategy
- Smart Data Scheme context
Governance
How OPDA is governed, the UK government initiative it sits inside, and the published rules that make the standard authoritative.
- UK initiative
- DPMSG · ToIP layers
- Conformance · change management
- Lifecycle · risk & liability
Engagement
Where the work happens — DPMSG, working groups, monthly all-member updates, the YouTube channel and transcripts.
- 8 Steering Group meetings
- 6 working groups
- 15 YouTube videos + transcripts
- Monthly all-member updates
Modelling
The technical semantic-modelling work — schemas, bounded contexts, data dictionary, business glossary, ontology, SHACL, JSON-LD.
- Standards stack · Bounded contexts
- PDTF overlays
- Data dictionary (8,458 properties)
- Business glossary (554 concepts)
- OWL · SHACL · JSON-LD
Implementation
How to build — install @pdtf/schemas, compose overlays, validate, work with verified claims and JSON-LD.
- Quickstart (~3 min)
- Schema composition
- Validation (Ajv)
- Verified claims (W3C VC)
Adoption
Member implementations, Sandbox pilots, Smart Data Challenge prize entry, the HMLR Local Land Charges programme.
- 13 OPDA founding members
- 200+ councils on HMLR LLC
- SDCP Innovators prize 2025
- Live CLC + OPDA + Raidiam Sandbox
Library
The curated reading list — every document, transcript, recording and external reference held in the project archive.
- 500 MB source archive
- 5 cloned upstream repos
- 16 OPDA website pages · 70 blog posts
- NTS Material Info recovery archive
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