Realm URI

A realm is a field or domain of activity or interest that may be used to organize information (see Section 6.5.4 "Design of Media Types" in Fielding Dissertation).

A realm URI is used to identify and refer to a realm. By disclosing a realm, the server provides additional information to user agents, or other components, that they may use to apply special treatment to the content within the realm.

Format Rules

MUST be an absolute URI.

Normalization and Comparison

Given realm URI A and realm URI B, if A starts with B (using a simple string comparison after URI normalization as defined in Section 6 "Normalization and Comparison" in RFC 3986) then the realm identified by A is considered to be within the realm identified by B.