--- docbook-xml-4.5.orig/docbook-4.0/docbook.cat
+++ docbook-xml-4.5/docbook-4.0/docbook.cat
@@ -0,0 +1,39 @@
+  -- ...................................................................... --
+  -- Catalog data for DocBook XML V4.0 .................................... --
+  -- ...................................................................... --
+
+  -- public identifiers override system identifiers, if both are supplied   --
+OVERRIDE YES
+
+  -- ...................................................................... --
+  -- DocBook driver file .................................................. --
+
+PUBLIC "-//Norman Walsh//DTD DocBk XML V4.0//EN" "docbookx.dtd"
+SYSTEM "http://www.oasis-open.org/docbook/xml/4.0/docbookx.dtd" "docbookx.dtd"
+SYSTEM "http://docbook.org/xml/4.0/docbookx.dtd" "docbookx.dtd"
+DTDDECL "-//Norman Walsh//DTD DocBk XML V4.0//EN" "/usr/share/xml/declaration/xml.dcl"
+
+  -- ...................................................................... --
+  -- Other ways to refer to DocBook XML v4.0............................... --
+
+PUBLIC "-//Norman Walsh//DTD DocBook XML V4.0//EN" "docbookx.dtd"
+DTDDECL "-//Norman Walsh//DTD DocBook XML V4.0//EN" "/usr/share/xml/declaration/xml.dcl"
+
+  -- ...................................................................... --
+  -- DocBook modules ...................................................... --
+
+PUBLIC "-//Norman Walsh//ENTITIES DocBook XML Notations V4.0//EN" "dbnotnx.mod"
+PUBLIC "-//Norman Walsh//ENTITIES DocBook XML Character Entities V4.0//EN" "dbcentx.mod"
+PUBLIC "-//Norman Walsh//ELEMENTS DocBook XML Information Pool V4.0//EN" "dbpoolx.mod"
+PUBLIC "-//Norman Walsh//ELEMENTS DocBook XML Document Hierarchy V4.0//EN" "dbhierx.mod"
+PUBLIC "-//Norman Walsh//ENTITIES DocBook XML Additional General Entities V4.0//EN" "dbgenent.ent"
+
+-- Unofficial XML version of the CALS Table Model, publicly known as --
+--    PUBLIC "-//USA-DOD//DTD Table Model 951010//EN"                --
+PUBLIC "-//Norman Walsh//DTD CALS Table Model XML V4.0//EN" "calstblx.dtd"
+
+-- UNOFFICIAL conversion of the exchange table model to XML, based on the OASIS Exchange --
+--    Table Model PUBLIC "-//SGML Open//DTD Exchange Table Model 19960430//EN"           --
+PUBLIC "-//Norman Walsh//DTD Exchange Table Model 19960430 XML V4.0//EN" "soextblx.dtd"
+-- the following FPI is declared for the DTD inside the DTD, so I include it             --
+PUBLIC "-//OASIS//DTD XML Exchange Table Model 19990315//EN" "soextblx.dtd"