This package provides a standard compatible XPath 2 / XQuery 1.0 interpreter, with extensions for - among others - JSONiq, pattern matching, CSS and html; as well as functions to perform http/s requests on windows/linux/mac/android, an xslt-like webscraping language, and an auto update class.
See my webpage for the detailed internettools documentation. You can also test the XQuery engine with its online cgi service.