Index: exo.jcr.docs/exo.jcr.docs.developer/en/src/main/docbook/en-US/master.xml
===================================================================
--- exo.jcr.docs/exo.jcr.docs.developer/en/src/main/docbook/en-US/master.xml	(revision 6003)
+++ exo.jcr.docs/exo.jcr.docs.developer/en/src/main/docbook/en-US/master.xml	(working copy)
@@ -23,7 +23,7 @@
 "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd">
 <!-- adopted from http://anonsvn.jboss.org/repos/gatein/portal/trunk/docs/reference-guide/en/master.xml 
 and https://svn.jboss.org/repos/richfaces/tags/3.3.2.GA/docs/userguide/en/src/main/docbook/master.xml -->
-<book lang="en">
+<book lang="en" xml:id="JCRReferenceGuide">
   <bookinfo>
     <title>Reference Guide / eXo JCR</title>
 
