(XML QUERY Language) A language for querying XML documents within the W3C. Appropriate for related W3C standards (W3C XML Schema, XSLT, etc.), XQuery was created in the XPath language and uses the identical syntax for path expressions. Using the XQuery data model, XQuery processes the query by parsing the XML document, the schema as well as the query into hierarchical node trees. Furthermore, it produces an output schema while using query results.
The XML data supplies a way of regulating the storage of semi-structured data as well as historic data, together with other data requiring a CMS. XML might be accustomed to keep content itself and understanding based in the content.