XQuery and XPath Data Model
The XQuery and XPath Data Model ( XDM ) is the data model shared by the XPath 2 . 0 , XSLT 2 . 0 , XQuery , and XForms programming languages . 
<triplet> XQuery and XPath Data Model <subj> XQuery <obj> part of <triplet> XPath <subj> XSLT <obj> part of <subj> XQuery <obj> part of