XQuery JSONiq - sgml/signature GitHub Wiki
http://galax.sourceforge.net/doc/manual.pdf
http://galax.sourceforge.net/slides/edbt-summer-school2004.pdf
https://blogs.mulesoft.com/dev/mule-dev/mule-3-6-xml-xpath-xslt-xquery3/
https://www.xml.com/news/?tag=jsoniq
https://www.gnu.org/software/qexo/
https://www.xml.com/pub/a/2002/12/23/xquery.html