Openfire : Create groups of users.

Hi everyone,

I have a requirement in my application where users are part of different groups(within my application). The relation between users and groups is many to many.

Also a user from a group can chat with another user form the same group. He should also be able to see all the online users from his own group.

I have setup the openfire server and am writing my own ios client.

Now I am very confused about a few things.

1. The "GROUP" of users in my case will be resembled by what object in the Openfire world : group or chat rooms??

2. If my application group is the same as group in openfire, how do I create a new group in openfire? I could find no such plugin.

     In fact I am a little confused about the whole architecture.

Thanks for the help in advance.