OPDA Knowledge base
Logical tier property

Registered Title

opda:RegisteredTitle

Registered Title

Summary

HM Land Registry title-register record. [Substance Kind (informational); UFO Substance Kind / DOLCE NonPhysicalEndurant — HMLR record-entity]. Identity criterion is title-number lineage + registry-event history: every lifecycle event is captured as a reified prov:Activity with explicit prov:wasDerivedFrom / prov:wasInvalidatedBy triples. Hard cases per ODR-0005 §3c: first registration (title opening), title closure, title merger, transfer between registers, title reissue on corrupt-plan replacement. Concept tier →

Attributes

This entity declares no module-local datatype properties at the foundation scope. Title-number, registry-tag, and class-of-title attributes are carried on the HMLR record-entity surface and exposed via PROV-O lifecycle reification rather than as direct datatype properties on the RegisteredTitle.

Relationships

PredicateTarget entityCardinalityInverseDescription
recordsEstateLegalEstate1..1—The RegisteredTitle’s HMLR record names the LegalEstate it documents (three-way structural seam: RegisteredTitle recordsEstate LegalEstate; LegalEstate vests in Property; RegisteredTitle identifiesSameProperty Property)
identifiesSamePropertyProperty0..*—Co-reference predicate to the physical Property (inherited foundation predicate)

Identity key

Identity key = title-number lineage + reified registry-event history. The title-number alone is insufficient — title-numbers may be reissued on corrupt-plan replacement or merger; identity persists through such events via the PROV-O lifecycle reification chain. Cross-reference: Concept-tier RegisteredTitle IC narrative.

Constraints

No additional non-cardinality constraints emitted at this tier. The three-way structural seam constraint (RegisteredTitle.recordsEstate must resolve to a LegalEstate that identifiesSameProperty as the RegisteredTitle’s own Property) is left to data-validation tooling outside the shapes graph.

Derived attributes

None at this tier.

ER diagram

%%{init: {"theme": "base", "themeVariables": {"primaryColor": "#E1BEE7", "primaryTextColor": "#4A148C", "primaryBorderColor": "#6A1B9A", "lineColor": "#37474F"}}}%% erDiagram accTitle: RegisteredTitle — Entity-Relationship Diagram accDescr: Direct-neighbour view of RegisteredTitle — records LegalEstate, identifies Property, bound by Proprietorship. RegisteredTitle ||--|| LegalEstate : "recordsEstate" RegisteredTitle }o--|| Property : "identifiesSameProperty" Proprietorship }o--|| RegisteredTitle : "bindsTitle"

Lifecycle state-transition diagram

RegisteredTitle identity persists through five hard-case registry events per ODR-0005 §3c. Identity is the title-number lineage plus reified registry-event history; title-numbers may be reissued but identity persists.

%%{init: {"theme": "base", "themeVariables": {"primaryColor": "#E1BEE7", "primaryTextColor": "#4A148C", "primaryBorderColor": "#6A1B9A", "lineColor": "#37474F"}}}%% stateDiagram-v2 accTitle: RegisteredTitle — Lifecycle State-Transition Diagram accDescr: RegisteredTitle identity persists through first registration, title merger, transfer between registers, and title reissue. Identity terminates only on title closure. [*] --> Opened : first registration
(title opening) Opened --> Open : record live Open --> Open : title merger
(identity persists via PROV) Open --> Open : transfer between registers Open --> Open : title reissue
(corrupt-plan replacement) Open --> Closed : title closure Closed --> [*]

Source ODR + ADR

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