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> I am guessing that it is not a compound document. True? No I think that's false. the problem with "compound documents" is not so much specifying a schema for them (although there are some problems with that) so much as doing something with them. For example it's easy enough to have a schema that allows SVG XHTML and MathML all in one file. But how do you actually render the beast. If you have some kind of plug in architecture (as we do) that allows an XHTML renderer to call out to SVG or MathML renderers, Does that architecture allow XHTML inside MathML inside SVG (not usually) What happens if you try to cut and paste a region that starts inside SVG and ends in MathML (nothing nice) If you select a different font size or other characteristic at the top level of your browser does this change percolate down to affect the renderings of the "foreign" sections (sometimes, on a good day). Given the current vogue for declaring a new mime type for each XML vocabulary, what mime type do you use for a document that mixes half a dozen such vocabularies, do you need a new mime type for each possible combination (who knows). I'm hoping the new WG (which I'm not on) will answer some of these questions... David ________________________________________________________________________ This e-mail has been scanned for all viruses by Star. The service is powered by MessageLabs. For more information on a proactive anti-virus service working around the clock, around the globe, visit: http://www.star.net.uk ________________________________________________________________________
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