XQuery - 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.gnu.org/software/qexo/

https://www.xml.com/pub/a/2002/12/23/xquery.html

https://www.xmlprague.cz/day3-2017/

http://xml.silmaril.ie/moreinfo.html