We use the DocBook XML and XSL distribution archives without any
changes to them. The reference files are located in the
src/zip folder and are expanded into the
target/ directory before the rendering
The file names must be reflected in the
docbook.xsl.version properties in the
docbook.properties file. If you want to use e.g. a
newer XSL version, you can put it into
docbook.properties to reflect this change.
Let us know how it works out for you.