Hi,
writing about XEP-0136.
I't seems to me that there is an inconsistency between section 7.2
http://xmpp.org/extensions/xep-0136.html#manage-retrieve
"To request a page of messages from a collection the client sends a
<retrieve/> element. The 'with' and 'start' attributes specify the
participating full JID and the start time (see XEP-0082). Both
attributes MUST be included to uniquely identify a collection."
That is, "the participating full JID" is stated here,
and section 10.2
http://xmpp.org/extensions/xep-0136.html#impl-exactmatch
that is referred to by the previous section:
"When the 'exactmatch' attribute is set to "true" or "1" on an element
of <item/>, <list/>, <remove/>, or <retrieve/>, a 'with' value such as
"example.com" matches that exact JID only rather than <[EMAIL PROTECTED]>,
<[EMAIL PROTECTED]>, or <example.com/*>"
where including the element <retrieve/> among those with wich the
exactmatch attribute can be used seems to imply that a collection can be
retrieved using only a part of the JID.
/Paolo