[Standards] Which one to use: `authorization-identity` or `authorization-identifier`

Hello, I am confused about those two elements: `authorization-identity` and `authorization-identifier`. Are they equivalent? They seem to be used in the same context. Grepping the XEPS repo shows both are used: $ grep -rl authorization-identity ./xep-0484.xml ./inbox/xep-fast.xml ./inbox/sasl2.xml ./xep-0386.xml $ grep -rl authorization-identifier ./xep-0480.xml ./inbox/xep-downgrade-prevention.xml ./inbox/xep-scram-upgrade.xml ./inbox/sasl2.xml ./xep-0198.xml ./xep-0388.xml ./xep-0474.xml What confuses me is that they both are used in the same context, f. ex.: "XEP-0386: Bind 2" has `authorization-identity` in successful Bind response: https://xmpp.org/extensions/xep-0386.html#example-4 <success xmlns='urn:xmpp:sasl:2'> &lt;authorization-identity&gt;user(a)example.com/AwesomeXMPP.4232f4d4 </authorization-identity> <bound xmlns='urn:xmpp:bind:0'> <metadata xmlns='urn:xmpp:mam:2'> <start id='YWxwaGEg' timestamp='2008-08-22T21:09:04Z' /> <end id='b21lZ2Eg' timestamp='2020-04-20T14:34:21Z' /> </metadata> </bound> </success> But "XEP-0388: Extensible SASL Profile" uses `authorization-identifier` https://xmpp.org/extensions/xep-0388.html#example-7 <success xmlns='urn:xmpp:sasl:2'> <!-- Base64 of: 'v=msVHs/BzIOHDqXeVH7EmmDu9id8=' --> <additional-data> dj1tc1ZIcy9CeklPSERxWGVWSDdFbW1EdTlpZDg9 </additional-data> &lt;authorization-identifier&gt;user(a)example.org&lt;/authorization-identifier&gt; </success> Is it valid to use `authorization-identifier` in all those cases? What about other XEPS that use `authorization-identity` f. ex. "XEP-0484: Fast Authentication Streamlining Tokens" ? https://xmpp.org/extensions/xep-0484.html#example-3 It seems that clients need to expect both variants anyway. I am hoping for some advice or clarification, maybe I have missed something. Thanks, Andrzej -- *Come see us at: *Alchemy Conf 2-3 Apr | ElixirConf EU 15-16 May | Code BEAM Lite Stockholm 2 Jun | Lambda Days 12-13 Jun | *Learn more >> <https://www.erlang-solutions.com/events/>* Erlang Solutions cares about your data and privacy; please find all details about the basis for communicating with you and the way we process your data in our Privacy Policy. <https://www.erlang-solutions.com/privacy-policy.html> You can update your email preferences or unsubscribe from all lists here. <https://forms.erlangsolutions.com/email-preference?epc_hash=pZxDpeyjOBLTF6PHvHhRqcHgo7EMrP5UyVBVmFrgF3g>