diff --git a/Doc/lectures.xml b/Doc/lectures.xml
index eabc0ae164885afce1eb6a8561898faaed9877dc..257c78d3e0b5758b2567f75a6b101aebc70ab91f 100644
--- a/Doc/lectures.xml
+++ b/Doc/lectures.xml
@@ -38,7 +38,99 @@
</abstract>
</info>
- <xi:include href="preface.xml" xpointer="element(/1)"/>
+ <preface version="5.0" xml:id="preface">
+ <title>Preface</title>
+
+ <para>This document is available in the following formats:</para>
+
+ <glosslist xml:id="availableFormats">
+ <glossentry>
+ <glossterm><uri
+ xlink:href="https://freedocs.mi.hdm-stuttgart.de/webhelp">https://freedocs.mi.hdm-stuttgart.de/webhelp</uri></glossterm>
+
+ <glossdef>
+ <para>Online <productname
+ xlink:href="http://docbook.sourceforge.net/release/xsl/current/webhelp/docs">Web
+ help</productname> documentation.</para>
+ </glossdef>
+ </glossentry>
+
+ <glossentry>
+ <glossterm><uri
+ xlink:href="https://freedocs.mi.hdm-stuttgart.de/mobil">https://freedocs.mi.hdm-stuttgart.de/mobil</uri></glossterm>
+
+ <glossdef>
+ <para>Online documentation providing simplified navigation suitable
+ for (some) tablet readers.</para>
+ </glossdef>
+ </glossentry>
+
+ <glossentry>
+ <glossterm><filename
+ xlink:href="https://freedocs.mi.hdm-stuttgart.de/webhelp/lectures.epub">lectures.epub</filename></glossterm>
+
+ <glossdef>
+ <para><xref linkend="glo_EPUB"/> containing <xref
+ linkend="glo_SVG"/> images and MathML formulas based on <link
+ xlink:href="https://www.mathjax.org">MathJax JavaScript</link>
+ rendering.</para>
+
+ <caution>
+ <para>Some older <productname
+ xlink:href="https://en.wikipedia.org/wiki/EPUB">Epub</productname>
+ readers may not support current standards. <productname
+ xlink:href="http://calibre-ebook.com">Calibre</productname> is
+ known to work.</para>
+ </caution>
+ </glossdef>
+ </glossentry>
+
+ <glossentry>
+ <glossterm><filename
+ xlink:href="https://freedocs.mi.hdm-stuttgart.de/webhelp/printversion.pdf">printversion.pdf</filename></glossterm>
+
+ <glossdef>
+ <para><xref linkend="glo_PDF"/> document providing sophisticated
+ printout typography (hopefully!).</para>
+
+ <caution>
+ <para>These lecture notes are heavily based both on external links
+ and video resources. Using <productname
+ xlink:href="https://en.wikipedia.org/wiki/Portable_Document_Format">PDF</productname>
+ thus imposes media related limitations.</para>
+ </caution>
+ </glossdef>
+ </glossentry>
+
+ <glossentry>
+ <glossterm><link
+ xlink:href="https://freedocs.mi.hdm-stuttgart.de/webhelp/lectures.zip">lectures.zip</link></glossterm>
+
+ <glossdef>
+ <para>Self contained zip archive of previously mentioned resources
+ for offline usage. Does contain the following offline links:</para>
+
+ <itemizedlist>
+ <listitem>
+ <para><filename
+ xlink:href="https://freedocs.mi.hdm-stuttgart.de/webhelp/printversion.pdf">printversion.pdf</filename></para>
+ </listitem>
+
+ <listitem>
+ <para><filename
+ xlink:href="lectures.epub">lectures.epub</filename></para>
+ </listitem>
+ </itemizedlist>
+ </glossdef>
+ </glossentry>
+ </glosslist>
+
+ <mediaobject>
+ <imageobject>
+ <imagedata fileref="Sd1/Ref/Svg/freedocs.svg" scale="50"/>
+ </imageobject>
+ </mediaobject>
+ </preface>
<part xml:id="sd1">
<title>Software development 1</title>
diff --git a/Doc/preface.xml b/Doc/preface.xml
deleted file mode 100644
index ae54dcc8b560d82403c45383d0e98de6f8853321..0000000000000000000000000000000000000000
--- a/Doc/preface.xml
+++ /dev/null
@@ -1,101 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<preface version="5.0" xml:id="preface" xmlns="http://docbook.org/ns/docbook"
- xmlns:xlink="http://www.w3.org/1999/xlink"
- xmlns:xila="http://www.w3.org/2001/XInclude/local-attributes"
- xmlns:xi="http://www.w3.org/2001/XInclude"
- xmlns:svg="http://www.w3.org/2000/svg"
- 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>Preface</title>
-
- <para>This document is available in the following formats:</para>
-
- <glosslist xml:id="availableFormats">
- <glossentry>
- <glossterm><uri
- xlink:href="https://freedocs.mi.hdm-stuttgart.de/webhelp">https://freedocs.mi.hdm-stuttgart.de/webhelp</uri></glossterm>
-
- <glossdef>
- <para>Online <productname
- xlink:href="http://docbook.sourceforge.net/release/xsl/current/webhelp/docs">Web
- help</productname> documentation.</para>
- </glossdef>
- </glossentry>
-
- <glossentry>
- <glossterm><uri
- xlink:href="https://freedocs.mi.hdm-stuttgart.de/mobil">https://freedocs.mi.hdm-stuttgart.de/mobil</uri></glossterm>
-
- <glossdef>
- <para>Online documentation providing simplified navigation suitable
- for (some) tablet readers.</para>
- </glossdef>
- </glossentry>
-
- <glossentry>
- <glossterm><filename
- xlink:href="https://freedocs.mi.hdm-stuttgart.de/webhelp/lectures.epub">lectures.epub</filename></glossterm>
-
- <glossdef>
- <para> <xref linkend="glo_EPUB"/> containing <xref linkend="glo_SVG"/>
- images and MathML formulas based on <link
- xlink:href="https://www.mathjax.org">MathJax JavaScript</link>
- rendering.</para>
-
- <caution>
- <para>Some older <productname
- xlink:href="https://en.wikipedia.org/wiki/EPUB">Epub</productname>
- readers may not support current standards. <productname
- xlink:href="http://calibre-ebook.com">Calibre</productname> is known
- to work.</para>
- </caution>
- </glossdef>
- </glossentry>
-
- <glossentry>
- <glossterm><filename
- xlink:href="https://freedocs.mi.hdm-stuttgart.de/webhelp/printversion.pdf">printversion.pdf</filename></glossterm>
-
- <glossdef>
- <para> <xref linkend="glo_PDF"/> document providing sophisticated
- printout typography (hopefully!).</para>
-
- <caution>
- <para>These lecture notes are heavily based both on external links
- and video resources. Using <productname
- xlink:href="https://en.wikipedia.org/wiki/Portable_Document_Format">PDF</productname>
- thus imposes media related limitations.</para>
- </caution>
- </glossdef>
- </glossentry>
-
- <glossentry>
- <glossterm><link
- xlink:href="https://freedocs.mi.hdm-stuttgart.de/webhelp/lectures.zip">lectures.zip</link></glossterm>
-
- <glossdef>
- <para>Self contained zip archive of previously mentioned resources for
- offline usage. Does contain the following offline links:</para>
-
- <itemizedlist>
- <listitem>
- <para><filename
- xlink:href="https://freedocs.mi.hdm-stuttgart.de/webhelp/printversion.pdf">printversion.pdf</filename></para>
- </listitem>
-
- <listitem>
- <para><filename
- xlink:href="lectures.epub">lectures.epub</filename></para>
- </listitem>
- </itemizedlist>
- </glossdef>
- </glossentry>
- </glosslist>
-
- <mediaobject>
- <imageobject>
- <imagedata fileref="Sd1/Ref/Svg/freedocs.svg" scale="50"/>
- </imageobject>
- </mediaobject>
-</preface>