First of all, OxygenXML has a free trial license that will not affect your output in any way. Probably the fastest way. However, I'm a little curious why Docbook in particular is an intermediate format not intended for end-user consumption, I think the idea is that you then want to create beautiful PDF and HTML from this? If this is the case, not a bad plan. In addition, not a lot of work to write their own XSL stylesheet for this, you just need to show:
complexTypeand simpleTypeand elementin the db: from xs:nameup db:titleand xd:annotationup para, then you can treat it with the help of free tools, such as Saxony and docbook tools.
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