| 摘要 |
A presence system for managing user groups includes a presence server for collecting and storing presence information and preference information on a plurality of presentities. The presence information for each presentity identifies the availability of the presentity, and the preference information for each presentity identifies a scope of presentity presence information provided to one or more watchers of the presentity. The presence server is capable of subscribing user groups formed of members including one or more presentities or one or more watchers, in which each of the user groups has group preference information associated therewith set in response to one or more members of the user group.
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