Kurt made mention of Adobe MARS in a comment to my “DIRTY LITTLE* post from a couple days ago, and given the fact that Kurt is *MUCH* more qualified to provide proper commentary on this, I will leave it to him to do just that.
In the mean time, a couple of snippets from Eliot Kimber’s recent post to whet your appetite,
MARS is an XML-based format that is intended as a functional replacement for PDF. It’s not really accurate to call it an XML version of PDF because it’s not a simple transliteration of PDF into tags (which could be done easily enough) but a ground-up exercise in designing and XML-based scheme for doing what PDF does.
MARS tries to use standards as much as it can and it seems to do so to a remarkable level of completeness. It uses SVG for representing each page, supports the usual standards for media objects (bitmaps, videos, etc.). Uses Zip for packaging, and so on.
Within Acrobat, the user experience off MARS is identical to that for PDF: all the behavior and functionality is the same. There is a MARS plug-in for Adobe 8 (reader or professional).
And if that wasn’t enough, at the bottom of the above linked page, you will find…
The content on this wiki is licensed under a Creative Commons Attribution 2.5 License. Macromedia requires no attribution (details).
Adobe… YOU ROCK!!! :D