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    <p>The error removes any preface, ough.<br>
    </p>
    <br>
    <div class="moz-cite-prefix">Am 06.05.2018 um 09:04 schrieb Bernhard
      Kleine:<br>
    </div>
    <blockquote type="cite"
      cite="mid:669ec792-83a0-45e6-cddc-eaeeb2c7efbb@gmx.net">
      <pre wrap="">Dear all,

I have the following preface:

<?xml version="1.0" encoding="UTF-8"?>
<?xml-model href=<a class="moz-txt-link-rfc2396E" href="http://docbook.org/xml/5.1/rng/docbook.rng">"http://docbook.org/xml/5.1/rng/docbook.rng"</a>
    schematypens=<a class="moz-txt-link-rfc2396E" href="http://relaxng.org/ns/structure/1.0">"http://relaxng.org/ns/structure/1.0"</a>?>
<?xml-model href=<a class="moz-txt-link-rfc2396E" href="http://docbook.org/xml/5.1/sch/docbook.sch">"http://docbook.org/xml/5.1/sch/docbook.sch"</a>
    type="application/xml"
schematypens=<a class="moz-txt-link-rfc2396E" href="http://purl.oclc.org/dsdl/schematron">"http://purl.oclc.org/dsdl/schematron"</a>?>
<!DOCTYPE chapter[
    <!ENTITY % my-entities SYSTEM "../Myentities.ent">
    %my-entities;
    ]>
<preface xmlns=<a class="moz-txt-link-rfc2396E" href="http://docbook.org/ns/docbook">"http://docbook.org/ns/docbook"</a>
    xmlns:xlink=<a class="moz-txt-link-rfc2396E" href="http://www.w3.org/1999/xlink">"http://www.w3.org/1999/xlink"</a>
    xmlns:xi=<a class="moz-txt-link-rfc2396E" href="http://www.w3.org/2001/XInclude">"http://www.w3.org/2001/XInclude"</a>
    version="5.1">
    <title>Vorwort zur vierten Auflage</title>
    <xi:include href="Vorwort4Auflage.xml"/>
    <xi:include href="Vorwort3Auflage.xml"/>
    <xi:include href="Vorwort2Auflage.xml"/>
    <xi:include href="Vorwort1Auflage.xml"/>

</preface>

The separate files are all composed like this:

<?xml version="1.0" encoding="UTF-8"?>
<?xml-model href=<a class="moz-txt-link-rfc2396E" href="http://docbook.org/xml/5.1/rng/docbook.rng">"http://docbook.org/xml/5.1/rng/docbook.rng"</a>
    schematypens=<a class="moz-txt-link-rfc2396E" href="http://relaxng.org/ns/structure/1.0">"http://relaxng.org/ns/structure/1.0"</a>?>
<?xml-model href=<a class="moz-txt-link-rfc2396E" href="http://docbook.org/xml/5.1/sch/docbook.sch">"http://docbook.org/xml/5.1/sch/docbook.sch"</a>
    type="application/xml"
schematypens=<a class="moz-txt-link-rfc2396E" href="http://purl.oclc.org/dsdl/schematron">"http://purl.oclc.org/dsdl/schematron"</a>?>
<!DOCTYPE chapter [
    <!ENTITY % my-entities SYSTEM "../Myentities.ent">
    %my-entities;
    ]>
<simplesect xmlns=<a class="moz-txt-link-rfc2396E" href="http://docbook.org/ns/docbook">"http://docbook.org/ns/docbook"</a>
xmlns:xlink=<a class="moz-txt-link-rfc2396E" href="http://www.w3.org/1999/xlink">"http://www.w3.org/1999/xlink"</a>
xmlns:xi=<a class="moz-txt-link-rfc2396E" href="http://www.w3.org/2001/XInclude">"http://www.w3.org/2001/XInclude"</a>
    version="5.1"><title>Vorwort</title>
    <para>bedanken wir uns auch an dieser Stelle.</para>
    <para>im Dezember 2006</para>
</simplesect>

A chapter where the error does not appear starts similarly, but with
chapter instead of simplesect. However, changing <!DOCTYPE chapter [
to
<!DOCTYPE simplesect [
does not help to get rid of the message.

What do I wrong?

Kind regards

Bernhard

</pre>
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</pre>
    </blockquote>
    <br>
    <pre class="moz-signature" cols="72">-- 
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