[xml/sgml-pkgs] Bug#1000816: Bug reported upstream (including a patch)

[Sebastian Pipping]

Hi!

TL;DR the warning output is from libxml2 and the issue is caused by
content of file /usr/share/docbook2X/xslt/common/text/l10n-set.xml
that is indeed part of package docbook2x.

I have filed a report for this upstream with both a detailed analysis
and a patch at https://sourceforge.net/p/docbook2x/bugs/25/ .

I have pushed that very patch in Gentoo just now. Would be cool to
stop seeing that warning again and again also in Debian and Ubuntu.
Thank you!

Best, Sebastian