fop for 12.3 needs xml-commons-jaxp-1.3-apis from e.g. Documentation:Tools

Tools of the SUSE Documentation Team and documentation-related tools, used for building the contents in project Documentation.

GeekoDoc is a RELAX NG schema used for current SUSE documentation.

Tools of the SUSE Documentation Team and documentation-related tools, automated builds.

This is an example user that is used in the official OBS documentation,
see http://openbuildservice.org/help/manuals/

Play ground for a more recent DocBook 5.2 package for Debian/Ubuntu.

http://ftp.debian.org/debian/pool/main/d/docbook5-xml/