Oxygen XML Forum

Posted: **Tue Mar 07, 2006 11:43 am**

Hi,

I have a DocBook DTD 4.4 article with XIncludes and I cannot validate it. Is anything wrong with my Oxygen 7/WinXP configuration or with my source file?

Code: Select all

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

<!DOCTYPE article PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN" 

                         "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd" [

     <!ENTITY % xinclude SYSTEM "../../../../xinclude.mod" >

     %xinclude;

]>

<article>

    <title>Release Notes</title>

    <section>

        <title>Getting help</title>

        <xi:include href="introduction.xml"

            xpointer="xpointer(/preface/section[@id='getting_help']/*)"

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

    </section>

</article>

I get the following messages:

Description: W SchemeUnsupported: The XPointer scheme 'xpointer' is not supported.
Description: W Include operation failed, reverting to fallback. Resource error reading file as XML (href='introduction.xml'). Reason: XPointer resolution unsuccessful.
Description: F An 'include' failed, and no 'fallback' element was found.

How can I fix it?
The XPath expression is correct, I have checked it directly in introduction.xml and it returns the required elements.

Thanks,

-Zby

Posted: **Tue Mar 07, 2006 12:40 pm**

Hi Zby,

As the error message says the xpointer scheme is not supported. This is when you validate in oXygen with Xerces (that is the default validate action). For more details see:
http://xerces.apache.org/xerces2-j/faq- ... html#faq-8
You may try to use a shorthand pointer instead, something like

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

You also have the option to validate with other processors like LIBXML for instance which is preconfigured in oXygen and that may handle the xpointer sheme. If you decide for that then I think you need to use also XSLTProc as the XSLT processor in order to get the XInclude properly processed.

Best Regards,
George

Posted: **Tue Mar 07, 2006 2:09 pm**

Well, I understand the error message. My question is what XML processor should I use to validate XIncludes with xpointer="xpointer()" scheme. That is, what XML processor (if any) supports this scheme if Xerces doesn't?

My question is a reference to Bob Stayton's book, exactly to the section on processing modular DocBook files (http://sagehill.net/docbookxsl/Xinclude.html).

Does the difficulty with the XIncludes validation mean Oxygen does not support that kind of modularization?

Thanks,

-Zby

Posted: **Tue Mar 07, 2006 5:16 pm**

The follow up of the discussion is on the DocBook applications mailing list:
http://lists.oasis-open.org/archives/do ... 00060.html

Best Regards,
George

Oxygen XML Forum

XInclude validation problem

XInclude validation problem