[xep-support] Maximum Change Version in footer by page

[jalinares at cox.net]

Ken,

That worked out great,

Thank you 

---- "G. Ken Holman" <gkholman at CraneSoftwrights.com> wrote: 
> At 2007-09-27 17:20 -0400, jalinares at cox.net wrote:
> >I am trying to add the maximum version of changes found on a page. 
> >fo:marker and fo:retrieve only allow me to display the first and 
> >last occurrence that are on each page. Is there an easy way to get 
> >the max value of node by page?
> 
> Yes, but it is a trick, not a feature.  XSL-FO does not offer the 
> arbitration between retrieved markers.  In my training material this 
> is demonstrated as implementing classification levels in secure 
> documents (classified, secret, top secret, etc.) on a page basis.
> 
> (1) - choose a unique marker class for each version, using the text of
>        the version number as the text of the marker class
> 
> (2) - in the perimeter region render all of the possible marker classes,
>        one at a time, each in a separate absolutely-positioned block
>        container positioned at the identical location with identical size
>      - assign a higher z-index= property to each block container for each
>        version retrieved
>      - in each block container render a block with a solid background the
>        same colour as the perimeter background
>      - retrieve the marker class into this block
> 
> You get the desired effect because the highest z-index= retrieved 
> obscures the lesser ones and any higher ones not retrieved are empty 
> blocks that do not obscure the highest retrieved.
> 
> I hope this helps.
> 
> . . . . . . . . . . . . . . Ken
> 
> --
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