XQuery is a query and functional programming language that is designed to query collections of XML data XQuery* 1.0 was developed by the XML, Query working group of the W3C.
The mission of the XML Query project is to provide flexible query facilities to extract data from real and virtual documents on the World Wide Web,
therefore finally providing the needed interaction between the Web world and the database world. Ultimately, collections of XML files will be accessed like databases.
A query in XQuery is an expression that:
1) Reads a sequence of XML fragments or atomic values,
2) Returns a sequence of XML fragments or atomic values.
