The XQuery and XPath Data Model (XDM) is the data model shared by the XPath 2.0, XSLT 2.0 and XQuery programming languages. It is a W3C recommendation and forms an integral part of all three languages. Originally, it was based on the XPath 1.0 data model which in turn is based on the XML Information Set.
The XDM consists of flat sequences of zero or more items of different types. Items can be typed or untyped and include atomic values as well as XML nodes (with elements, attributes and text nodes, etc.). Instances of the XDM can optionally be XML schema-validated.
Famous quotes containing the words data and/or model:
“To write it, it took three months; to conceive it three minutes; to collect the data in it—all my life.”
—F. Scott Fitzgerald (1896–1940)
“She represents the unavowed aspiration of the male human being, his potential infidelity—and infidelity of a very special kind, which would lead him to the opposite of his wife, to the “woman of wax” whom he could model at will, make and unmake in any way he wished, even unto death.”
—Marguerite Duras (b. 1914)