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Subject: RE: [docbook] how to throw error if imagedata not found

Hi Chris,

Here’s what we do:


The build runs an xslt that produces a list of images used. Ant then checks to make sure all are the images available and kills with a useful error message the build if any are missing. To avoid an annoying build/fail/fix/repeat cycle, the error message shows all missing images rather than only listing the first missing image it finds.


I think to do something like this within the xslt would require that you write an extension/call out to java.




From: jwcampbell@gmail.com [mailto:jwcampbell@gmail.com] On Behalf Of Jim Campbell
Sent: Wednesday, October 13, 2010 11:27 AM
To: chris snow
Cc: docbook@lists.oasis-open.org
Subject: Re: [docbook] how to throw error if imagedata not found


Hi there, Chris,

On Wed, Oct 13, 2010 at 9:16 AM, chris snow <chsnow123@gmail.com> wrote:

Is it possible for an error to be thrown during processing if a file
referred to by imagedata is not found?

       <imagedata fileref="../../images/coding-cycle.png"/>

Many thanks,


It might not be exactly what you are looking for, but one option would be to include the image via an xinclude mechanism, and then include a xinclude fallback.  It might go something like this:



       <xi:include fileref="../../images/coding-cycle.png">
         <xi:fallback>Image file is unavailable.</xi:fallback>


You would need to use a DTD or schema (or at least a DTD fragment) that allows for use of xinclude.


I hope this helps,


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