Open Property Data Association
Smart Property Data Trust Framework
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    Logical tier transaction

    Transaction Chain

    https://opda.org.uk/pdtf/TransactionChain

    Aggregate of dependent Transactions linked by buyer-also-seller participant overlap. S007 Q4 dual-mechanism: (a) recursive opda:dependsOnTransaction predicate between Transactions; (b) opda:chainMembers list-of-Transactions on a TransactionChain parent. Chain-length cap: sh:maxInclusive 7 per CLC data (ADR-0012 emits the SHACL constraint). Chain status is derived (any-blocked → chain-blocked).

    Classification

    UFO: Aggregate (Guizzardi 2005 Ch. 4 §4.6 — collective of Relator instances). Dual modelling per S007 Q4 (recursive predicate + Aggregate) chosen because both shapes appear in real-world chain queries.

    Sources

    • harness/odr/ODR-0007/section-Q4

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