ADM.4:4.2 - Identify the subjects before comparing the claims
Determine whether the statements concern one subject, different subjects, or subjects whose identity remains unresolved. Use the information appropriate to the actual event or relation: participant identities, the relevant action, source reference and its issuer, amount and currency where applicable, effective time and supporting evidence.
A matching local identifier is evidence to interpret within its source scheme. It does not alone prove event identity. Repeated participants can also take part in another event. Use SIE.5 when the cross-source identity question cannot be resolved from adequate supplied facts; SIE.4 and SIE.6 supply the needed alignment and claim-composition methods for a substantive meaning problem.
For a relation history, use ADM.3 and the direct A.6.REL identity rule only as far as the receiving use needs. A different edition of a claim can still describe the same relation.