Most of the links on the repo's landing page point to eupnea-linux.github.io and return 404 (e.g. supported devices).
354 karma · joined April 6, 2018
It has some extensions to the standard that are pretty nice (JSONiq, CSS selectors, html “template” matching), but you can limit it to just standard XPath/XQuery if you like.
I recommend getting the nightly v .99 build if you give it a try, the stable .98 version is pretty old and I’ve had no issues with .99
You should try an XPath 3 based implementation. XQuery 3.1 has some nice features not found in XPath 2 implementations e.g. native JSON support, the arrow operator (piping), group by clause in FWLORs. XSLT 3.0 has some nice new stuff too, but I use that less