Once you have created your DocBook XML, you can use the DocBook XSL Stylesheets to transform your document into a HTML, PDF, or HTMLHelp document.
Here's some errors that we've encountered in the past.
If you see an error message like this:
Making portrait pages on USletter paper (8.5inx11in) No adjustColumnWidths function available. Processing terminated by xsl:message at line 203 make: *** [default] Error 1
Check that the extensions jar file is in your CLASSPATH. Documentation on this is found in doc/extensions.html of the stylesheet distribution.