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:
“Mental health data from the 1950’s on middle-aged women showed them to be a particularly distressed group, vulnerable to depression and feelings of uselessness. This isn’t surprising. If society tells you that your main role is to be attractive to men and you are getting crow’s feet, and to be a mother to children and yours are leaving home, no wonder you are distressed.”
—Grace Baruch (20th century)
“I’d like to be the first model who becomes a woman.”
—Lauren Hutton (b. 1944)