diff --git a/reference/xmldiff/book.xml b/reference/xmldiff/book.xml
index ae352f088..ef0d36701 100644
--- a/reference/xmldiff/book.xml
+++ b/reference/xmldiff/book.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<!-- EN-Revision: 68c2c871505aadf983f16113c5b077b335ce8d76 Maintainer: bng5 Status: ready -->
+<!-- EN-Revision: 46a9cdd2dbef4ec89bf65fad9930e2feb78bbb98 Maintainer: bng5 Status: ready -->
 <!-- Reviewed: no -->
 
 <book xml:id="book.xmldiff" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
@@ -15,7 +15,6 @@
  </preface>
 
  &reference.xmldiff.setup;
- <!--  &reference.xmldiff.constants; -->
  <!-- &reference.xmldiff.examples; -->
  <!-- &reference.xmldiff.reference; -->
  &reference.xmldiff.xmldiff.base;
diff --git a/reference/xmldiff/constants.xml b/reference/xmldiff/constants.xml
deleted file mode 100644
index 61ac37519..000000000
--- a/reference/xmldiff/constants.xml
+++ /dev/null
@@ -1,29 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- EN-Revision: e9366ee458b2900c53a503b1ad97664e1d9a8859 Maintainer: bng5 Status: ready -->
-<!-- Reviewed: no -->
-
-<appendix xml:id="xmldiff.constants" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
- &reftitle.constants;
- &no.constants;
-</appendix>
-
-<!-- Keep this comment at the end of the file
-Local variables:
-mode: sgml
-sgml-omittag:t
-sgml-shorttag:t
-sgml-minimize-attributes:nil
-sgml-always-quote-attributes:t
-sgml-indent-step:1
-sgml-indent-data:t
-indent-tabs-mode:nil
-sgml-parent-document:nil
-sgml-default-dtd-file:"~/.phpdoc/manual.ced"
-sgml-exposed-tags:nil
-sgml-local-catalogs:nil
-sgml-local-ecat-files:nil
-End:
-vim600: syn=xml fen fdm=syntax fdl=2 si
-vim: et tw=78 syn=sgml
-vi: ts=1 sw=1
--->
diff --git a/reference/xmldiff/setup.xml b/reference/xmldiff/setup.xml
index fd68e4c30..ca0b5da3f 100644
--- a/reference/xmldiff/setup.xml
+++ b/reference/xmldiff/setup.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<!-- EN-Revision: ca9ab17a33c04a11415f0224e0736b7e861289cc Maintainer: bng5 Status: ready -->
+<!-- EN-Revision: 765b2d6eec7dfbaeed900b32aa91a1360d73df42 Maintainer: bng5 Status: ready -->
 <!-- Reviewed: no -->
 
 <chapter xml:id="xmldiff.setup" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
@@ -27,13 +27,6 @@
   </para>
  </section>
 
-<!--
- <section xml:id="xmldiff.configuration">
-  &reftitle.runtime;
-  &no.config;
- </section>
- -->
-
  <!--
  <section xml:id="xmldiff.resources">
   &reftitle.resources;