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The roster lets you keep track of the availability ("presence") of other users. A roster also allows you to organize users into groups such as "Friends" and "Co-workers". Other IM systems refer to the roster as the buddy list, contact list, etc.
Roster Entries
Every user in a roster is represented by a RosterEntry, which consists of:
• An XMPP address (e.g. [email protected]).
• A name you've assigned to the user (e.g. "Joe").
• The list of groups in the roster that the entry belongs to. If the roster entry belongs to no groups, it's called an "unfiled entry".
The significant methods of ActionForm are: validate () & reset ().
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