A request XML packet retrieving info on subscribers of a mailing list includes the get-members operation node:
<packet version="1.4.2.0">
<maillist>
<get-members>
...
</get-members>
</maillist>
</packet>
The get-members node is presented by the MaillistDelListInputType type (maillist.xsd), and its graphical representation is as follows:

maillist.xsd).Remarks
You can retrieve info on subscribers of multiple mailing lists using different filtering rules in a single packet. Add as many get-members operations as the number of different filtering rules to be applied.
<get-members>
¡
</get-members>
¡
<get-members>
¡
</get-members>