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[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: Partyin' like it's 1999
 Len > How do those browsers declare support for the > namespaces? In their documentation. mathml support is built in just as xhtml or xhtml is. > I like the IE means. Well having some kind of scalable plugin architecture (as in IE) is clearly a good thing. The mechansim of incorporating *ML into the browser by taking the entre source tree of the browser, modifying it to render *ML then persuading the browser maintainers that you are trustworthy enough to check it back into the main branch clearly doesn't scale to more than a couple of languages in addition to *html. The specifics of the architecture in IE though are decidedly odd. Despite being loosely based on xml namespaces you can only use the behaviors feature when rendering non-xml html documents, the actual namespace declaration is done in a microsoft specicfic pi (You might have an xml namespaces declaration for the namespace as well, but it's the Processing instruction that really matters) The binding of the behaviour is really to a prefix rather to a namepace URI, and in particular there has to be a prefix. You can't go <html xmlns="xhtml namespace"> ... <math xmlns="mathml namespace"> the mathml (or at least its outer most element) has to be explitly prefixed with whichever prefix is bound to the rendering behaviour. Also there are some limitations in the way the renderer can communicate with the page layout engine. Specifically for mathml, in the native rendering in moz, inline mathml expressions can take part in the line breaking in a paragraph (as is normal in mathematical documents) whereas IE only lets the rendering behaviour negotiate a rectangualar area (as far as I understand) which means that it just acts as a big single box as far as the linebreaking css layout rules for the surrounding paragraph go. What's needed is some generic portable interface to a plugin architecture that works. I wish http://lists.w3.org/Archives/Public/public-cdf/ showed a bit more excitement/activity on the subject of compound documents:-) 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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