About XQuery 1.0 and XPath 2.0 Functions and Operators (Second Edition)
XQuery 1.0 and XPath 2.0 Functions and Operators (Second Edition)- Defines basic operators and functions on the datatypes defined in XML Schema Part 2: Datatypes for use in XQuery, XPath, and other related XML standards. (W3C Recommendation 14 December 2010)