Section: 28.8 Generic Public Subscription Identifier (GPSI)
Content: The Generic Public Subscription Identifier (GPSI) is defined in clause 5.9.8 of 3GPP TS 23.501[ System architecture for the 5G System (5GS) ]  [119]. The GPSI is defined as: - a GPSI type: in this release of the specification, it may indicate an MSISDN or an External Identifier; and - dependent on the value of the GPSI type: - an MSISDN as defined in clause 3.3; or - an External Identifier as defined in clause 19.7.2. NOTE: Depending on the protocol used to convey the GPSI, the GPSI type can take different formats.