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   Re: [xml-dev] Tree v. Table - A relational XML object model...?

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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 Megginson, david@megginson.com, http://www.megginson.com/


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