Re: [xsl] XSL FO and change bars

[Jim Melton <jim dot melton at acm dot org>]

Mark, et al,

At 08:46 AM 05/07/2001 -0400 Monday, Mark Nahabedian <naha@ai.mit.edu> wrote:

>     I do not immediately see how to implement change bars through XSLT
>     and XSL FO.
>
>What are you starting with?
>
>     * Two XML documents of the same schema that first need to be
>       compared with one another?
>
>     * An XML document and additional descriptions of what has changed
>       relative to some previous version?  Are such descriptions
>       provided as XPath expressions which bound the start and end of
>       each changed region?  Are they in the same order as the affected
>       parts of the document?
>
>I don't know enough about XSL myself to help you with your problem but
>these questions might help clarify the problem and how to approach it.

Actually, I'm not comparing two versions of a document, nor am I comparing 
two documents of the same schema.  Instead, I wish to manually insert 
markup (tags, elements) into the XML source file to indicate "here's the 
start of something new or changed" and "here's the end of the new or 
changed section" (as well as "here's the point where I deleted 
something").  This is related to the second of your two scenarios/bullets 
above, except this would not be external descriptions, but internal markup.

I have no problem defining those tags/elements in my DTD or schema, nor 
writing XSLT code to handle them and process them into XSL FO.  What I 
cannot figure out is whether it is possible to actually identify the 
vertical offset on a page where the changebar must start (corresponding to 
the "start tag" and the vertical offset on a possibly different page where 
the changebar must stop (corresponding to the "end tag").

Apologies all around for not making this clear in my initial submission.

Thanks again,
    Jim
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