Hello Tobias,
I think that you should query for instances of xs:schema rather than ino:collection.
Something like this:
http://localhost/tamino/myDb/ino:collection?_xql=/xs:schema[@ino:docname="xmldb/Telephone"]
The ino:docname attribute has the format /
I hope that helps,
Trevor.
#Tamino#API-Management#webMethods