dblatex
dblatex is a command-line tool that converts DocBook XML documents into various other formats, most notably PDF. It acts as a bridge between the semantic markup of DocBook and the presentational capabilities of typesetting systems. The primary function of dblatex is to take a DocBook source file and render it into a high-quality PDF document suitable for printing or digital distribution. It achieves this by leveraging the power of LaTeX, a well-established typesetting system, to perform the actual rendering. The conversion process involves parsing the DocBook XML, transforming it into LaTeX code, and then using a LaTeX engine (like pdfLaTeX or XeLaTeX) to produce the final output.
Beyond PDF, dblatex can also generate other formats, though PDF is its most common and robust output.