The page http://www.stoa.org/epidoc/gl/latest/idx-nontei.html of the GL, provides a link to an XSL style sheet "still under development" -- but very appealling -- used by the Epigraphic Database Heidelberg, to insert link in an existing file...
https://github.com/PietroLiuzzo/popwithvoc/blob/master/populateFromList.xsl
Delete or update link?
Correct link is now https://github.com/EAGLE-BPN/epidocupconversion/blob/master/edh/popwithvoc.xsl