Open Property Data Association
Smart Property Data Trust Framework
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    Programme

    The PDTF schema is the existing Digital Property Pack schema. SPDTF is the first scheme draft authored collaboratively across the property industry and its stakeholders. This page explains the progression from schema to scheme.

    The short version

    SPDTF is in development, not adopted. The PDTF schema remains the existing Digital Property Pack schema. The ontology extracted from it is a separate, schema-derived evidence source, not part of the PDTF schema and not an approved SPDTF draft.

    From schema to scheme

    The PDTF schema provides JSON Schemas, overlays, a data dictionary, a business glossary and implementation evidence. A separate ontology was extracted from those materials to make their concepts, relationships and constraints inspectable. SPDTF development uses both bodies of evidence alongside participant evidence, recognised sources and competency questions. Domain working groups test meaning in bounded contexts before governance can promote any candidate into the collaboratively authored scheme draft.

    How the three bodies of work relate
    PDTF schemaSchema-derived ontologySPDTF
    The existing Digital Property Pack JSON Schema, overlays, dictionary and glossary.A separate extraction that exposes concepts, relationships, constraints and provenance for review.The first scheme draft authored collaboratively across industry and stakeholders.
    Provides implementation, compatibility and migration evidence.Provides semantic and coverage evidence; it does not acquire the schema's authority.Uses both evidence sets alongside participant sources and working-group decisions.
    Remains available for existing implementations.Keeps its own maturity and provenance labels.Working groups own domain meaning; governance controls candidate promotion.

    UK Smart Data context

    DBT Smart Data is external government policy and prospective scheme context. Property remains subject to feasibility, governance, legal assessment and consultation. OPDA contributes evidence and tested approaches; SPDTF is not an approved statutory property Smart Data scheme, and OPDA participation in government forums does not confer government authority.

    Read the official context in the Smart Data 2035 strategy, the multi-sector call for evidence and the Home Buying and Selling Reform Roadmap.

    Explore the Programme

    Programme section

    Strategy

    Read the programme direction, roadmap and policy context that frame the work.

     Programme section

    DBT Smart Data

    Follow the government Smart Data context and OPDA’s related evidence and activity.

     Programme section

    Programme activity

    Find the programme’s working-group and engagement activity.

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    For programme leaders and new readers

    Programme

    Understand the purpose, current direction, roadmap and policy context for a shared property-data scheme.

     For decision-makers and reviewers

    Governance

    See who can decide, what is under review, and how authority, maturity and lifecycle are recorded.

     For domain experts and ontology learners

    Modelling

    Learn why ontologies are used, then follow the evidence-up method, contextual boundaries and mapping approach.

     For implementers, stewards and interoperability leads

    Development

    Review collaborative work products, candidates, open questions, outputs and attributed third-party inputs.

     For contributors and facilitators

    Groups

    Find group scopes, member guidance, contribution routes and the workspaces where domain meaning is reviewed.

     For researchers and auditors

    Resources

    Trace terms, source records, standards, recordings and historical material with their provenance and maturity.

     For members, partners and prospective contributors

    Marketing

    Use approved promotion and recruitment materials without treating campaign copy as standards authority.

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