Changelog for docbook-dtd31-sgml-1.0-21.mga8.noarch.rpm :

* Fri Oct 18 2013 umeabot 1.0-21.mga4+ Revision: 503930- Mageia 4 Mass Rebuild
* Fri Jan 11 2013 umeabot 1.0-20.mga3+ Revision: 349043- Mass Rebuild - https://wiki.mageia.org/en/Feature:Mageia3MassRebuild
* Wed Apr 11 2012 pterjan 1.0-19.mga2+ Revision: 230179- imported package docbook-dtd31-sgml