The Selfdocbook (XML edition) is a self-documenting introduction to DocBook DocBook (XML) book. It includes its own DocBook XML source in the appendix, and so can be used to learn DocBook by example.
You can get a copy of the Selfdocbook (XML edition) in various ways; presumably you already know one of them since you are reading the Selfdocbook (XML edition) right now. Here are the choices:
View it using a web browser, by pointing it to the Selfdocbook (XML edition) web page.
Grab the PostScript version, ready to print out.
Download the PDF version, if that's your preferred format.
Fetch the DocBook XML source and build it.
You can use the Selfdocbook (XML edition) to learn DocBook by example: if you see something that you want to know how to do, you can simply flip to Appendix A, DocBook XML source to find out how it is done.
I learned DocBook from the excellent book DocBook: The Definitive Guide by O'Reilly Associates, also available online. It is probably a good idea to have a glance through that in order to get more of an overview than this book provides.
This Selfdocbook (XML edition) was built on 18 December 2003.