A statement that asserts a limited identity attribute of a subscriber without containing the attribute value from which it is derived, independent of format. For example, instead of requesting the attribute “birthday,” a derived value could be “older than 18.” Instead of requesting the attribute for “physical address,” a derived value could be “currently residing in this district.” Previous versions of these guidelines referred to this construct as an “attribute reference.”
Sources:
NIST SP 800-63-4
[