[JDEV] How to get roster of certain group?

[Ru-Shan Cheng]

Hi all,

I want to do some changes to jabber server that can send certain group's roster to client only.

For example, My roster have 3 groups : A, B, C, then then I get the roster of A group when
I login in A resource.

Could somebody give me some suggestions about following solutions to the question?

1. Client send : 
   <iq id="limit_group_roster" type="get">
     <query xmlns="jabber:iq:roster">
	   <limit group='AAAA'/>
	 </query>
   </iq>   

2. Predefined namespace in DTD:
   <?xml version="1.0" ?>
     <!ELEMENT limit (limit*)>
       <!ATTLIST limit group cdata #IMPLIED >

   Client send:
   <iq id="limit_group_roster" type="get">
     <query xmlns="jabber:iq:roster">
       <limit xmlns='http://10.1.2.114/group.dtd' group='AAAA'/>
     </query>
   </iq>
   
Which one is better?
Any pointers and suggestion will be helpful!