MUC

The discussion groups in XMPP are called MUC (multi-user-chat).

MUCs are very versatile discussion groups that can be configured in a variety of ways; in other messaging systems they may be called rooms, discussion groups, channels, etc... This nomenclature is often used in the xmpp world as well.

Main characteristics

• A MUC can be semi-anonymous, where your JID is only known by its moderators. You are identified by a nickname in the form of room@domain/nickname. Alternatively it can be non-anonymous and show your JID to all participants.

• A MUC is usually persistent i.e. it still exists even after the last person left.

• If a MUC is moderated, users have to request voice in order to send messages.

• A MUC can be hidden or published in a server's public directory. It can also be members-only, where only approved members are allowed to join. It can even be password-protected.

These MUC features are usually displayed by your client before joining.

Resources

• Here a page with more technical information in Tech pages section of this wiki.