XInclude problem

Hi all,

I got a problem with XInclude. I have a document, root element is <section>:

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE section PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"

                        
"http://www.docbook.org/xml/4.3/docbookx.dtd">

<section id="summary_rep"> <!-- this is the root -->

  <title>Summary Report</title>

  <para>bla bla bla.</para>

  <xi:include href=""F_subscr_info.xml"" xmlns:xi="http://www.w3.org/2001/XInclude"></xi:include>

  <xi:include href=""F_net_info.xml"" xmlns:xi="http://www.w3.org/2001/XInclude"></xi:include>

  <xi:include href=""F_net_status.xml"" xmlns:xi="http://www.w3.org/2001/XInclude"></xi:include>

  <xi:include href=""F_desktop_status.xml"" xmlns:xi="http://www.w3.org/2001/XInclude"></xi:include>

  

  <section id="summary_chrono">

        ...

  </section>

</section>

and this document validates and XInclude works perfectly. Note that
included documents have also <section> as the root element.

But I also have a different document:

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE section PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"

                        
"http://www.docbook.org/xml/4.3/docbookx.dtd">

<section id="summary_rep"> <!-- this is the root -->

  <title>Summary Report</title>

  <para>bla bla bla.</para>

  <xi:include href=""F_subscr_info.xml"" xmlns:xi="http://www.w3.org/2001/XInclude"></xi:include>

  <xi:include href=""F_net_info.xml"" xmlns:xi="http://www.w3.org/2001/XInclude"></xi:include>

  <xi:include href=""F_net_status.xml"" xmlns:xi="http://www.w3.org/2001/XInclude"></xi:include>

  <xi:include href=""F_desktop_status.xml"" xmlns:xi="http://www.w3.org/2001/XInclude"></xi:include>

  

  <section id="summary_chrono">

        ...

  </section>

 <xi:include href=""F_mail.xml"" xmlns:xi="http://www.w3.org/2001/XInclude"></xi:include>

</section>

I can't validate this document though the included one is similar to
those in the above example. The error message says the last xinclude
element is unknown and the content of the section must match... and
here goes the list of allowed elements. Those xincludes at the top are
resolved but that at the bottom isn't. What's wrong with this document
and why xinludes aren't allowed in the place I chose.

Tks,

Zbyszek