List subcollections

[Wolfgang]

> This way i only list the documents of a specific collection.
> How can i list the subcollections?

This question is implementation specific. I would suggest to ask such 
questions on the corresponding product specific mailing list (which 
should be the eXist list in your case). For a quick answer, have a look 
the code in
webapp/admin/browse.xqm, which implements a collection browser.

Wolfgang