RFC 3921:Extensible Messaging and Presence Protoco...
RFC-Ref

A - B - C - D - E - F - G - H - I - J - L - M - N - O - P - Q - R - S - T - U - V - W - X

unique identifier

Click on the red underlined text to get to the source

7. Roster Management
... roster item or "contact". The "key" or unique identifier for each roster item is a JID, ...

A - B - C - D - E - F - G - H - I - J - L - M - N - O - P - Q - R - S - T - U - V - W - X

Google
Web
RFC-Ref
RFC-Ref.org
Frontpage
Global Index
RFC
Sister Sites
Chess-Ref.org
Law-Ref.org
InChI.info
Zvon.org