Concept taxonomy (SKOS)
The hierarchical organisation of PDTF concepts — what falls under what. Expressed in SKOS for tool interoperability.
Status
This is a stub for upcoming work. The structure below is what we plan to populate; existing artefacts in source/ that feed it are cited inline.
What already exists
- Initial SKOS seed —
source/00-deliverables/semantic-models/business-glossary.ttl(554 concepts, generated from merged OPDA Glossary + PDTF schema annotations). - 1,557 unique leaf property names from the schemas (see Data dictionary & glossary).
- 54 business terms from the OPDA Glossary spreadsheets.
Proposed top-level concept scheme
flowchart TB
classDef root fill:#1a4d80,color:#fff,stroke:#0b2545,stroke-width:3px;
classDef l1 fill:#eef4f8,stroke:#1a4d80,color:#0b2545;
PDTF[PDTF Concept Scheme]:::root
TX[Transaction lifecycle]:::l1
PROP[Property]:::l1
PART[Participant]:::l1
CLAIM[Claim & Evidence]:::l1
DOC[Document]:::l1
FORM[Form]:::l1
SRCH[Search]:::l1
FIN[Financial]:::l1
LEGAL[Legal]:::l1
PDTF --> TX
PDTF --> PROP
PDTF --> PART
PDTF --> CLAIM
PDTF --> DOC
PDTF --> FORM
PDTF --> SRCH
PDTF --> FIN
PDTF --> LEGAL
Top-level SKOS concepts. Each branch is a tree of more specific concepts.
Next work
- Map each of the 1,557 leaf names to one of the 9 branches
- Build the second-level hierarchy (e.g. Property → Tenure → Leasehold)
- Cross-reference with BASPI / TA6 / NTS taxonomies where they exist
- Reconcile context-specific synonyms via
skos:exactMatch/skos:closeMatch