Help needed with xi.include in docbook5 (convert from docbook4)

Hi,

How do I use xi:include in docbook5?

In the main document I have following entry:

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

 

The overview.xml is currently defined as docbook4 (see extract from overview.xls below). May this the problem?

 

When I try to create the html file

xsltproc --output darktable.html /home/pierre/Downloads/docbook-xsl-1.79.2/xhtml/docbook.xsl darktable.xml 

I get following message:

Element include in namespace 'http://www.w3.org/2001/XInclude' encountered in book, but no template matches.

What does the message mean?

 

And the overview.xml looks like:

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

 

    <!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"

                   "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [

                                   <!ENTITY % ownChar_dtd SYSTEM "../dtd/ownChar.dtd">

                                   %ownChar_dtd;

                               ]>

    <chapter status="final" xml:id="overview_chapter">

     ....

 

Thanks

Pierre