XQL (XML Query Language)
XQL (XML Query Language) is a way to locate and filter the elements (data fields) and text in an Extensible Markup Language (XML) document. XML files are used to transmit collections of data between computers on the Web. XQL provides a tool for finding and/or selecting out specific items in the data collection in an XML file or set of files. It is based on the pattern syntax used in the Extensible Stylesheet Language (XSL) and is proposed as an extension to it.
The XSL pattern language is a declarative way to indicate specific elements for processing. It uses simple directory notation. For example,
For more information, we recommend reading the XQL proposal at the World Wide Web Consortium (W3C) Web site.