Now you can write your content in DocBook format. Make sure that the master file of your DocBook (i.e. the file that contains the <book> element) is called master.xml and lives directly under the en directory (see Figure 2.1, “The JBoss Messaging docs directory”). You can either put the entire content in master.xml or divide up the chapters and place them in the modules/ directory. If you do the latter, you should reference the chapter files from the master.xml file via entity references. Please see the docbook-support/docs/guide/en/master.xml file to see how this is done.