https://mail.gnome.org/archives/xslt/2003-August/msg00004.html
Re: [xslt] Passing parameters to exsl:document
xsltpassingparametersdocument
https://developer.mozilla.org/en-US/docs/Web/XML/EXSLT/Reference/exsl
Common (exsl) - EXSLT | MDN
The EXSLT Common package provides basic functions that expand upon the capabilities of XSLT. The namespace for the Common package is http://exslt.org/common.
commonexsltmdn