Tiny source-backed heritage assurance fixture methodology

Tiny assurance subset

This is a declared three-record assurance subset: two exact NHLE List entries and one exact 2025 Heritage at Risk row. It is designed for fast producer, negative-case and real-browser consumer checks. It is not the Coventry and Warwickshire denominator and must not be used as a completeness claim.

Source preservation

The records are copied from the faithful frozen acquisition by exact identity, without inventing substitute values. Coventry and Stratford-on-Avon boundary coordinates were used by the parent spatial intersection. Their large coordinate arrays are intentionally omitted here, while canonical SHA-256 geometry receipts and source boundary attributes preserve the identity check.

Geometry

Both NHLE assurance anchors retain their source multipoint coordinates. The fixture therefore exercises explicit source locations without pretending that its omitted boundary polygons are present.

Link validation

The same identifier-binding and local Markdown-to-HTML link gates apply to the tiny fixture. Its NHLE rich pages, HAR register searches bound to exact source List Entry Numbers and frozen source-feature URLs are kept distinct.

Relationship projection rules

Relationships use the record IRIs registered by the YAML-LD semantic layer. Official annual HAR-to-NHLE links come only from a source List entry field; boundary links are deterministic projections of the recorded intersection. Derivation and rule links return to this published explanation rather than to an unserved identifier path. Annual HAR rows retain year precision and never invent a day or month.

Frozen source

Snapshot: heritage-coventry-warwickshire-20260803-v2-tiny-v1

Observed: 2026-08-03T00:00:00Z