Docbook helps to write a structured source document but the final document has to be generated using third-party tools. These tools are called 'Transformers'. Depending on the format of the desired output the action of one or several transformers may be required.
In this setup we'll use the following:
ePub format
The Xalan transformer
The Saxon transformer
PDF format
The Xalan transformer
The FOP transformer
Webhelp format
The Xalan transformer
The Nexwave indexer