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Tim Bray writes: > Charles Goldfarb (lead designer of SGML) actually suggested that we do > this in XML, simply forbid mixed content. I'd be pretty suspicious of Charles on this point -- it would have ensured that people kept using SGML for large documentation systems and limited XML to Web stuff. I do believe that it would be useful to have a middle-level data layer (say, "XDL") on top of XML. That layer could enforce both restrictions (no mixed content) and more abstract, data-specific conventions (such as typing, if it were actually a good idea). Other data oriented specs could be built on top of it. All the best, David -- David Megginson, david@m..., http://www.megginson.com/
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