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diff --git a/Doc/Sda1/xslt.xml b/Doc/Sda1/xslt.xml
index 57a7b36a413582a338637f52090abcca0a2d6825..8d9a7aa8a851ee5d9f4409f7730653a20eb9e18f 100644
--- a/Doc/Sda1/xslt.xml
+++ b/Doc/Sda1/xslt.xml
@@ -6,7 +6,7 @@
          xmlns:m="http://www.w3.org/1998/Math/MathML"
          xmlns:html="http://www.w3.org/1999/xhtml"
          xmlns:db="http://docbook.org/ns/docbook">
-  <title>The Extensible Stylesheet Language XSL</title>
+  <title>The Extensible stylesheet Language XSL</title>
 
   <para>XSL is a <link xlink:href="http://www.w3.org/Style/XSL">W3C
   standard</link> which defines a language to transform XML documents into the
@@ -1675,23 +1675,66 @@ you need some </emphasis>&lt;em&gt;time&lt;/em&gt;<emphasis role="bold">.</empha
               content definition. Extend the current book2html.xsl to account
               for these extensions.</para>
 
-              <para
-              xlink:href="http://www.w3.org/TR/xslt20/#element-copy-of">As we
-              already saw in our memo example itemized lists in Xhtml are
-              represented by the element <tag class="starttag">ul</tag>
-              containing <tag class="starttag">li</tag> elements. Since <tag
+              <para>As we already saw in our memo example itemized lists in
+              <xref linkend="glo_XHTML"/> are represented by the element <tag
+              class="starttag">ul</tag> containing <tag
+              class="starttag">li</tag> elements. Since <tag
               class="starttag">p</tag> elements are also allowed to appear as
               children our itemized lists can be easily mapped to Xhtml tags.
               A<tag class="starttag">link</tag> node may be transformed into
               <tag class="starttag">a href="..."</tag> Xhtml node.</para>
 
-              <para>The table model is a simplified version of the Xhtml table
-              model. Read the <abbrev
+              <para>The table model is a simplified version of the <xref
+              linkend="glo_XHTML"/> table model. Read the <abbrev
               xlink:href="http://www.w3.org/Style/XSL">XSL</abbrev>
-              documentation of the element <tag
-              class="emptytag">xsl:copy-of</tag> at <link
-              xlink:href="http://www.w3.org/TR/xslt20/#element-copy-of">copy-of</link>
+              documentation of the element <tag class="emptytag"
+              xlink:href="http://www.w3.org/TR/xslt20/#element-copy-of">xsl:copy-of</tag>
               for processing tables.</para>
+
+              <tip>
+                <para>The Oxygen plugin's default configuration does not
+                validate <xref linkend="glo_XML"/> input documents. Using the
+                <link
+                xlink:href="http://www.w3.org/TR/xpath#function-id">id(...)</link>
+                function requires two IDE configuration steps:</para>
+
+                <glosslist>
+                  <glossentry>
+                    <glossterm>Enable Saxon EE (Enterprise version) in your
+                    XSL transformation scenario:</glossterm>
+
+                    <glossdef>
+                      <informalfigure>
+                        <mediaobject>
+                          <imageobject>
+                            <imagedata fileref="Ref/Screen/eclipseOxygenSaxonEE.png"/>
+                          </imageobject>
+                        </mediaobject>
+                      </informalfigure>
+                    </glossdef>
+                  </glossentry>
+
+                  <glossentry>
+                    <glossterm>Enable <xref linkend="glo_XML"/> input
+                    validation using <guimenu>Window</guimenu> --&gt;
+                    <guimenuitem>Preferences</guimenuitem>:</glossterm>
+
+                    <glossdef>
+                      <informalfigure>
+                        <mediaobject>
+                          <imageobject>
+                            <imagedata fileref="Ref/Screen/eclipseOxygenSaxonEnableValidation.png"/>
+                          </imageobject>
+                        </mediaobject>
+                      </informalfigure>
+
+                      <para>Caveat: With input validation enabled you will no
+                      longer be able to process invalid or well formed <xref
+                      linkend="glo_XML"/> document instances.</para>
+                    </glossdef>
+                  </glossentry>
+                </glosslist>
+              </tip>
             </question>
 
             <answer>