[oXygen-user] Validate xref when XInclude

27 Sep 2004

      Hi,

I can't validate xref's when using XInclude. Though as I understand it should 
be possible with Apache Xerces-J. Comment out xref's and all is valid. When I 
transform the document the xref's (uncommented), are resolved correctly.

Validation returns:

"An element with the identifier "docbookxsl" must appear in the document. 
preface.xml"

Any ideas?

Following is relevant info from files.

BOOK.XML 
---------------------------
<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
                      "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd" [
<!ENTITY % xinclude SYSTEM "/home/sean/apps/oxygen/docbook/dtd/xinclude.mod">
%xinclude;
<!ENTITY % global_ents SYSTEM "global.ent">
%global_ents;
]>
<!-- I use a combination of XInclude and Entities -->
<book>
...
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="preface.xml">
    <xi:fallback xmlns:xi="http://www.w3.org/2001/XInclude">FIX 
ME</xi:fallback>
  </xi:include>
...
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="biblio.xml">
    <xi:fallback xmlns:xi="http://www.w3.org/2001/XInclude">FIX 
ME</xi:fallback>
  </xi:include>
</book>

XREF IN PREFACE.XML
---------------------------
<para>The first, "Docbook - The Definitive Guide" <xref 
linkend="docbookxsl"/> is about the Docbook Document Type Definition 
(DTD).</para>

    <para>The second, "Docbook XSL - The Complete Guide" <xref 
linkend="docbooktdg"/> is about the Docbook Stylesheets (XSL's).</para>

BIBLIOENTRY in BIBLIO.XML
---------------------------

<biblioentry id="docbookxsl">
    <authorgroup>
      <author>
        <firstname>Bob</firstname>
        <surname>Stayton</surname>
      </author>
    </authorgroup>
...
</biblioentry>
<biblioentry id="docbooktdg">
    <authorgroup>
      <author>
        <firstname>Norman</firstname>
        <surname>Walsh</surname>
      </author>
      <author>
        <firstname>Leonard</firstname>
        <surname>Muellner</surname>
      </author>
    </authorgroup>
...
</biblioentry>

..........................
Oxygen	4.2
Apache Xerces-J 	2.6.2
Apache Xalan Java 	2.5.1
SAXON	6.5.3
Apache FOP	0.20.5
OASIS  DocBook  XML  DTD	4.2
DocBook  XSL	1.64.1

-- 
Sean Wheller
sean@enbaya.co.za
http://www.enbaya.co.za