Sip prensence introduce a series of documents, a good reference!

draft-ietf-simple-event-filter-funct-04.txt
draft-ietf-simple-event-list-07.txt
draft-ietf-simple-partial-pidf-format-04.txt
draft-ietf-simple-presence-10.txt
draft-ietf-simple-presence-data-model-04.txt
draft-ietf-simple-presence-rules-03.txt
draft-ietf-simple-xcap-06.txt
draft-ietf-simple-xcap-list-usage-05.txt
draft-ietf-sipping-trait-authz-00.txt
draft-levin-simple-interdomain-reqs-03.txt
draft-peterson-sipping-role-authz-01.txt
draft-rosenberg-simple-presence-processing-model-00.txt
IMPS Enews.pdf
insideWindowsMessenager.doc
pals-ua-reqs.pdf
PIM-2002_SIMPLE_update.pdf
Presence aware software using SIP.pdf
PresenceAwarenessServices.pdf
presence_server.pdf
Refences_C.pdf
sdonovan.ppt
Self Organizing SIMPLE A Proposed P2P Instant Messaging.pdf
SIP for Presence Service & Instant Messaging.pdf
SIP UA-brochure_Aug05.pdf
sipquest-presence-server.pdf
SIPServerTechnicalOverviewWhitepaper.pdf
SOSIMPLE_ A SIP-SIMPLE Based P2P VoIP and IM System.pdf
Test Cases for SIP Extension for Event State Publication.doc
Text Classification Rule Induction in the Presence of Domain-Specific Expression .pdf

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