4.8. Setting presence authorization
Presence information can be available at different levels and different scopes to different watchers. This means that different watchers may be authorized to view different parts of the presence information of a presentity. The choice of who sees what belongs to the presentity. The presentity can set such authorization levels using an XCAP-defined solution in the form of permission statements.
[Draft-ietf-geopriv-common-policy], [Draft-ietf-simple-presence-rules], [Draft-ietf-simple-common-policy-caps] and [Draft-ietf-simple-pres-policy-caps] define the XML schema along with its semantics as well as those sections that are mandatorily defined for XCAP usage.