https://www.w3.org/news/2013/xpath-30-xquery-30-xqueryx-30-are-w3c-candidate-recommendations/
XPath 3.0, XQuery 3.0, XQueryX 3.0 are W3C Candidate Recommendations | 2013 | News | W3C
The World Wide Web Consortium (W3C) is an international community where Member organizations, a full-time staff, and the public work together to develop Web...
xpath 3 0xquery