Nokia Nokia This document specifies the format and semantics associated to a 'resource' event package that allows SIP endpoints to publish the availability of generic resources. A resource can be, for example, files (e.g., images, video files, audio files), chat rooms, streaming content, printers, printer jobs, etc. This event package also allows SIP endpoints to subscribe to changes in the availability of resources, or perform searches for the availability and location of a given resource. Support for partial notifications and publications is also accomplished by using XML patch operations.