A property should retain its identity as facts, addresses and organisations change.

The foundation supports UPRNs and other identifiers, versioned addresses and facts, evidence, access and audit history.

Stable identifiers

Use a durable identity rather than relying on one mutable address string.

Preserve what changed, when and from which recorded source.

Separate public facts from private operational and evidence contexts.

CLAIM BOUNDARY

An identifier links a record; it does not by itself verify ownership, legal status or every attached fact.