Open Property Data Association
Smart Property Data Trust Framework
Become a member Join a working group

    Implementation — overview

    This section is the engineer's view of PDTF. The Modelling section explains the vocabulary; this section is about building software that produces, validates, transmits and verifies PDTF transactions.

    The five-piece stack

    flowchart TB S1["`@pdtf/schemas *npm · v3.4.0*`"]:::service S2["`@pdtf/api *OpenAPI spec*`"]:::data S3["`trust-framework *spec repo*`"]:::data S4["`@pdtf/accreditation *conformance test suite*`"]:::service S5["`W3C VC / DID *verified claims wrapper*`"]:::service P[Your product]:::user S1 -.consumed by.-> P S2 -.consumed by.-> P S3 -.bound by.-> P P --> S4 P --> S5
    Most integrations consume Schemas + API spec; serious ones also satisfy the trust framework's accreditation criteria and emit Verifiable Credentials.

    The pieces

    ComponentWhere it livesWhat it gives you
    Schemas package npm: @pdtf/schemas · source: source/03-standards/schemas/ The base PDTF transaction schema + 18 main overlays + 16 extension overlays. Functions to merge them, validate, walk paths. See Schema composition.
    OpenAPI spec Source: source/03-standards/api/ v1.2 of the HTTP API. Defines the endpoints for transaction exchange. Implement on your side; or consume someone else's.
    Trust framework spec Source: source/03-standards/trust-framework/ The rules of the road — governance, security, audit, accreditation criteria. Published as a Mintlify docs site.
    Accreditation Conformance test suite (to be released) Mechanically check whether your implementation meets the criteria for OPDA-accredited intermediary or certified data source.
    Verified claims W3C VC Data Model 2.0 + DID 1.0 Wrapping PDTF transaction fragments as signed Verifiable Credentials for cross-party trust. See Verified claims.

    Common integration paths

    Use caseLikely overlaysStack needed
    Estate-agent product showing material-info-compliant listings baspi5, nts2, ntsl2 Schemas package + minimal API client
    Conveyancer firm consuming a property pack ta6, ta7, ta10, lpe1 Schemas + API consumer
    Lender taking a mortgage application fme1 Schemas + verified-claims verifier (need to trust the data)
    Search-product provider con29R, con29DW, llc1, oc1, rds Full stack — you're a certified data source
    Property tech orchestrator Many overlays composed at runtime Full stack incl. accreditation as intermediary

    Sub-pages

    Comments

    Loading comments…