DocBook Authoring and Publishing Suite (DAPS)

 DAPS contains a set of stylesheets, scripts and makefiles that enable
 you to create HTML, PDF, EPUB and other formats from DocBook XML with a
 single command. It also contains tools to generate profiled source
 tarballs for distributing your XML sources for translation or review.
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 DAPS also includes tools that assist you when writing DocBook XML:
 linkchecker, validator, spellchecker, editor macros and stylesheets for
 converting DocBook XML.