diff --git a/etc/schema/schemas.xml b/etc/schema/schemas.xml
index f1e0ed7856f..40175b056b1 100644
--- a/etc/schema/schemas.xml
+++ b/etc/schema/schemas.xml
@@ -1,7 +1,65 @@
 <?xml version="1.0"?>
+<!-- Copyright (C) 2003-2004, 2007-2020 Free Software Foundation, Inc.
+
+This file is part of GNU Emacs.
+
+GNU Emacs is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+GNU Emacs is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>. -->
+
 <locatingRules xmlns="http://thaiopensource.com/ns/locating-rules/1.0">
+  <transformURI fromPattern="*.xml" toPattern="*.rnc"/>
+
+  <uri pattern="*.xsl" typeId="XSLT"/>
+  <uri pattern="*.html" typeId="XHTML"/>
+  <uri pattern="*.rng" typeId="RELAX NG"/>
+  <uri pattern="*.rdf" typeId="RDF"/>
+  <uri pattern="*.dbk" typeId="DocBook"/>
+
+  <namespace ns="http://www.w3.org/1999/XSL/Transform" typeId="XSLT"/>
+  <namespace ns="http://www.w3.org/1999/02/22-rdf-syntax-ns#" typeId="RDF"/>
+  <namespace ns="http://www.w3.org/1999/xhtml" typeId="XHTML"/>
+  <namespace ns="http://relaxng.org/ns/structure/1.0" typeId="RELAX NG"/>
+  <namespace ns="http://thaiopensource.com/ns/locating-rules/1.0"
+	     uri="locate.rnc"/>
+
+  <documentElement localName="stylesheet" typeId="XSLT"/>
+  <documentElement prefix="xsl" localName="transform" typeId="XSLT"/>
+
+  <documentElement localName="html" typeId="XHTML"/>
+
+  <documentElement localName="grammar" typeId="RELAX NG"/>
+
+  <documentElement prefix="" localName="article" typeId="DocBook"/>
+  <documentElement prefix="" localName="book" typeId="DocBook"/>
+  <documentElement prefix="" localName="chapter" typeId="DocBook"/>
+  <documentElement prefix="" localName="part" typeId="DocBook"/>
+  <documentElement prefix="" localName="refentry" typeId="DocBook"/>
+  <documentElement prefix="" localName="section" typeId="DocBook"/>
+
+  <documentElement localName="RDF" typeId="RDF"/>
+  <documentElement prefix="rdf" typeId="RDF"/>
+
+  <documentElement localName="locatingRules" uri="locate.rnc"/>
+
+  <typeId id="XSLT" uri="xslt.rnc"/>
+  <typeId id="RELAX NG" uri="relaxng.rnc"/>
+  <typeId id="XHTML" uri="xhtml.rnc"/>
+  <typeId id="DocBook" uri="docbook.rnc"/>
+  <typeId id="RDF" uri="rdfxml.rnc"/>
+
   <documentElement prefix="office" typeId="OpenDocument"/>
   <documentElement prefix="manifest" localName="manifest" typeId="OpenDocument Manifest"/>
   <typeId id="OpenDocument" uri="od-schema-v1.2-os.rnc"/>
   <typeId id="OpenDocument Manifest" uri="od-manifest-schema-v1.2-os.rnc"/>
+
 </locatingRules>