[basex-talk] Quickest way to parse a DomSource

Hi all, I'm currently working on the usage of BaseX Xquery scripts inside a BPMN engine. I have to access portions of the XML representation of the BPMN file by binding the engine's API. The closest that I can get to a standard XML representation is currently a javax.xml.transform.dom.DOMSource. What is the shortest way to transform (in XQuery) this DomSource to a BaseX representation of the Document in order to query it? Thanks, Marco.