document can be composed from smaller modules
very useful for modular and configurable system
can be combined with profiling
XInclude standard can be used for composition of final document
more flexible system called “assemblies” is being currently developed for DocBook V5.1
<?xml version='1.0' encoding='utf-8'?> <book xmlns="http://docbook.org/ns/docbook" version="5.0" xml:lang="en" xmlns:xi="http://www.w3.org/2001/XInclude"> <title>Modular document</title> <xi:include href="preface.xml"/> <xi:include href="chapter1.xml"/> <xi:include href="chapter2.xml"/> </book>