Internal Program Version: XSLT lib  1.1.42

Libxslt is the XSLT C library developed for the GNOME project.
XSLT itself is a an XML language to define transformation for
XML. Libxslt is based on libxml2 the XML C library developed
for the GNOME project. It also implements most of the EXSLT
set of processor-portable extensions functions and some of
Saxon's evaluate and expressions extensions.

https://gitlab.gnome.org/GNOME/libxslt