- https://forum.xpdfreader.com/viewtopic.php?f=3&t=41211
- only the poppler toolset (the xpdf-related toolset) has “pdftohtml -xml“
- https://en.wikipedia.org/wiki/Poppler_(software)
- https://poppler.freedesktop.org
- https://anongit.freedesktop.org/git/poppler/poppler.git