The resolved, cross-system identity record for one real-world entity — the confirmed link between "Atlas Fabricators" in a group CRM and the same policyholder in an acquired subsidiary's legacy system — maintained and reused rather than re-resolved on every request.
Scales with the number of distinct real-world entities the tenant's systems collectively reference; can run into the hundreds of thousands for a large, fragmented enterprise
Indefinite; a wrong match corrected later must leave a visible trail, not silently overwrite
Only the control-bearing entities were modelled for lifecycle. Defensible as a starting point, but it does leave the entity model uneven, and this is incompleteness rather than a finding.