A statement asserting a property of an entity without necessarily containing identity information, independent of format. For example, for the attribute "birthday," a reference could be "older than 18" or "born in December."
Sources:
CNSSI 4009-2022
under attribute reference
A statement asserting a property of a subscriber without necessarily containing identity information, independent of format. For example, for the attribute “birthday,” a reference could be “older than 18” or “born in December.”
Sources:
NIST Privacy Framework Version 1.0