In section 3.3 of XEP-0054 it is defined that the same error condition MUST be used in both a case:
where a VCard request is addressed to an entity that does not exist, and;
where a VCard request is addressed at an entity for which no VCard is available.
RFC 6121 section 8.5.1 defines:
If the user account identified by the 'to' attribute does not exist, how the stanza is processed depends on the stanza type. For an IQ stanza, the server MUST return a <service-unavailable/> stanza error to the sender.
Prior to this change, both <service-unavailable/> and <item-not-found/> were offered as suitable conditions to be used in the error scenario defined in section 3.3. For this XEP to be more compatible with RFC 6121, only <service-unavailable> can be used.
This commit drops the <item-not-found> condition from the scenario, and elevates usage of to a MUST. It adds a note on backwards compatibility.
In section 3.3 of XEP-0054 it is defined that the same error condition MUST be used in both a case:
RFC 6121 section 8.5.1 defines:
Prior to this change, both
<service-unavailable/>and<item-not-found/>were offered as suitable conditions to be used in the error scenario defined in section 3.3. For this XEP to be more compatible with RFC 6121, only<service-unavailable>can be used.This commit drops the to a MUST. It adds a note on backwards compatibility.
<item-not-found>condition from the scenario, and elevates usage of