There might be new versions of internet drafts and thus links to them my be obsolete. In such case try increment version in link or find the draft on IETF by name.
[xcap] draft-ietf-simple-xcap-12.txt - XCAP specification.
[xcap_diff] draft-ietf-simple-xcap-diff-01.txt - XCAP changes notifications format.
[xcap_profiles] draft-ietf-sipping-config-framework-07.txt -XCAP user profiles.
[events] RFC 3265 - SIP Events.
[presence] RFC 3856 - Presence Event package.
[publish] RFC 3903 - Event state publication.
[winfo_doc] RFC 3858 - Data Format for watcher info.
[reg] RFC 3680 - SIP Reg Events.
[common auth] draft-ietf-geopriv-common-policy-05.txt.
[presence auth] draft-ietf-simple-presence-rules-03.txt - presence authorization XML based data format and usage with XCAP.
[rls] draft-ietf-simple-xcap-list-usage-05.txt - XML formats for representing resource lists.
[sip rls] draft-ietf-simple-event-list-07.txt - Event Notification Extension for Resource Lists.