>Let's say I have xml document. I've generated its pdf version and I've
>have printed it. After some time the original xml document is changed,
then I
>generate its pdf version again. But now I want to print only pdf
>pages, that were changed and I want to do it automatically.

If you are looking for the changed content only, you can try to
implement a diff algorithm for you xml and create change marks in
the pdf, then write a tool, perhaps based on xpdf
(http://www.foolabs.com/xpdf/) which prints only the pages with
change marks.
In general, the problem the way you formulated it is difficult to
solve, as small changes in the XML source may change the content
of a lot of pages in the PDF.


Joerg Pietschmann

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