diff -r 1eccaaededbe -r 58cf3c7d4b1b rpgtheory.xml
--- a/rpgtheory.xml	Thu Jan 26 16:51:38 2006 -0500
+++ b/rpgtheory.xml	Fri Feb 03 16:27:40 2006 -0500
@@ -1,6 +1,14 @@
 <?xml version="1.0"?>
 <!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
-      "/usr/share/sgml/docbook/dtd/xml/4.2/docbookx.dtd">
+      "/usr/share/sgml/docbook/dtd/xml/4.2/docbookx.dtd"
+[
+    <!ENTITY % local.common.attrib
+            "xmlns:xi CDATA #IMPLIED
+             xml:base CDATA #IMPLIED">
+    <!ELEMENT xi:include EMPTY>
+    <!ATTLIST xi:include href CDATA #REQUIRED>
+    <!ENTITY % local.article.class "|xi:include">
+]>
 <book
   xmlns:xi="http://www.w3.org/2003/XInclude">
   <bookinfo>