Here there are some links to screenshots of a working XQTav. Some minor details may have been changed in the recent versions.

1. Taverna advanced model explorer with XQTav processor on the right - VIEW
2. Accessing the XQTav built-in XQuery editor - VIEW
3. Inside the XQuery editor, main editor tab - VIEW
4. Examinig XQTav processor's ports and starting the XQuery generator - VIEW