Roster entries are contained in the list *jabber-roster*.
A roster entry is a symbol. Its name is the JID, and it is interned
in jabber-jid-obarray. A roster entry can have the following
properties:
xmlnamesubscriptionaskgroupsconnectedshowstatusresourcesconnected, show, status and
priority.
Incoming presence information is inserted in resources, and the
information from the resource with the highest priority is inserted in
show and status by the function
jabber-prioritize-resources.