+The value associated with the holder property is expected
+to be usable to identify the holder to the verifier.
+
+Often relevant metadata about the holder, as identified by the value of the
+holder property, is available to, or
+retrievable by, the verifier. For example, a holder can
+publish information containing the verification material used to secure
+verifiable presentations. This metadata is expected to be used when
+checking proofs on verifiable presentations. Some cryptographic
+identifiers contain all necessary metadata in the identifier itself. In those
+cases, no additional metadata is required. Other identifiers use verifiable
+data registries where such metadata is automatically published for use
+by verifiers, without any additional action by the holder.
+
+See the and + for additional examples related to subject and holder. +
+ ++Validation is the process by which verifiers apply business rules to +evaluate the propriety of a particular use of a verifiable credential. +
++A verifier might need to validate a given verifiable presentation +against complex business rules; for example, the verifier might need confidence +that the holder is the same entity as a subject of a verifiable +credential. In such a situation, the following factors can provide a +verifier with reasonable confidence that the claims expressed regarding +that identifier, in included verifiable credentials, are, in fact, about +the current presenter: +
+