That customization should work, and does work outside of the docbkx-maven-plugin. I
don't know how the plugin works, so I cannot say why it does not work for you. But if
the plugin uses the namespaced version of the DocBook XSL stylesheets, then any
xsl:template match attributes in a customization must specify the DocBook namespace
and prefix. See this reference for more information.
http://www.sagehill.net/docbookxsl/ProcesingDb5.html#Db5XsltBob Stayton
Sagehill Enterprises
bobs@sagehill.net