I have the trial version of 5.1 installed and I'm trying to work with the DocBook Xinclude sample. <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN" "http://www.docbook.org/xml/4.3/docbookx.dtd" [ <!ENTITY % xinclude SYSTEM "../../frameworks/docbook/dtd/xinclude.mod" > %xinclude; <!ENTITY % local.common.attrib "xml:base CDATA #IMPLIED" > ]> <book> <article> <title>Welcome to the Docbook</title> <xi:include href="section1.xml" xmlns:xi="http://www.w3.org/2001/XInclude"/> <xi:include href="section2.xml" xmlns:xi="http://www.w3.org/2001/XInclude"/> <xi:include href="section3.xml" xmlns:xi="http://www.w3.org/2001/XInclude"/> </article> </book> I haven't tinkered with this file, and everything is in place where the demo installed itself (Windows XP, for what it's worth -- not much, I know). When I try to "transform" the DocBook Xinclude sample, I get the following warnings: W No template matches xi:include in article. W No template matches xi:include in article. W No template matches xi:include in article. And the outpout has empty tags, like so: <xi:include></xi:include> <xi:include></xi:include> <xi:include></xi:include> I've seen the same sample work before, so I wonder what I've done to break the chain. (The files to be included are in place.) I bet this is simple, but I am clueless. Thanks in advance for your help.