XML support is built into Ant, and not only as far as build files go. You can validate XML documents using XML DTDs and schemas using the xmlvalidate task. You can read properties from an XML document using xmlproperty. You can use the xslt/style task to transform XML documents using XSLT. And you can use the antstructure task to generate an XML DTD for all the tasks Ant knows about.
Besides covering these and other XML tasks, I'm going to discuss XDoclet in this chapter. XDoclet is an open source code generation engine that is designed to run in Ant. Using codes that you embed in Java source code, XDoclet can generate code, deployment descriptors such as web.xml, and other artifacts for Web and EJB applications.
I'll also round out the discussion of EJB from the previous chapter by discussing the Ant EJB tasks, a specially designed set of optional tasks for developing Enterprise JavaBeans (EJBs).