W3C Recommendation 21 March 2017 Status Update (6 April 2021): Feedback, comments, error reports on this specification should be sent via GitHub https://github.com/w3c/qtspecs/issues or email to publ[email protected]. This version: https://www.w3.org/TR/2017/REC-xpath-functions-31-20170321/ Latest version of XPath and XQuery Functions and Operators 3.1: https://www.w3.org/TR/xpath-functions-31