OPDA Knowledge base
Concept tier descriptive

Survey

opda:Survey

Survey

A Survey is an authority-retrieved professional survey report for a Property — for example, a RICS HomeBuyer Report or a Building Survey.

Why it matters

Surveys are commissioned, delivered, and sometimes superseded or withdrawn during a transaction. OPDA models the Survey as a first-class Kind because it has its own authority-issued provenance chain (professional issuer), its own lifecycle (issued / superseded / re-issued / withdrawn), and its own role in the evidence chain underpinning Valuations and lender decisions.

If you are a conveyancer, valuer, or lender working with surveys, this is the entity whose lifecycle you query.

Hard cases

  • Re-survey. A fresh Survey supersedes an earlier one. The new Survey is its own record with a provenance link to the predecessor; the predecessor persists with a superseded status.
  • Supersession after issue. A Survey is issued, then superseded by a corrected version. The audit trail captures both — the original is not erased.
  • Withdrawal. A surveyor withdraws a report (e.g. for legal reasons). The Survey record persists with a withdrawal annotation; downstream consumers see the withdrawal status.

Identity Criterion

A Survey is identified by its (issuing surveyor, survey-id, issue date) triple. The IC tracks lineage through supersession and withdrawal — re-issuance produces a successor with a provenance link, not an in-place mutation. See the Logical tier → for the typed structure.

%%{init: {"theme": "base"}}%% flowchart LR accTitle: Survey related-Kinds neighbourhood graph accDescr: Survey as a professional surveyor's report concerning a Property; often informs a Valuation; sibling to other descriptive artefacts; identified by (surveyor, survey-id, issue-date). classDef centre fill:#E1BEE7,stroke:#6A1B9A,stroke-width:3px,color:#4A148C classDef cls fill:#B3E5FC,stroke:#0277BD,stroke-width:2px,color:#01579B Survey["Survey
(RICS surveyor)"]:::centre Property["Property"]:::cls Valuation["Valuation"]:::cls EPC["EPC Certificate
(sibling)"]:::cls Survey -->|"concerns"| Property Survey -->|"informs (often)"| Valuation Survey -.->|"siblingArtefact"| EPC

Source ODR

ODR-0008 — Property descriptive attributes §Q4a

Comments

Loading comments…