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   Re: [xml-dev] XML Schema is not yet widespread??

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Henry S. Thompson wrote:

>Adi Eio <adieio@gmail.com> writes
>>So, is it still right, and how I can know the current extent of XML
>>Schema on the Web?
>So yes, in some sense it's right that very few XML documents
>explicitly reference W3C XML Schemas.  But without sampling XML
>documents out there, checking their namespaces, if any, etc., it's
>very hard to get an objective measurement.
To add to what Henry has said, it is also perhaps more important to know
that the way people use XML Schemas is different from DTDs.  XML Schemas
are often used to generate applications or interfaces or mappings, 
rather than
for validation or value defaulting per se.

And the number of documents on the Web is a dodgy measurement anyway.
Messages are dynamically generated and don't sit in a file system, so they
won't get counted. Intermediate documents are similarly not available.
Perhaps a better count would be how many projects use XML Schemas
and how well they fared with it.  And even then, due to the
<euphemism>power</euphemism> of XML Schemas, or anything else,
often the satisfaction is more related to the tools used and the skills 
level of
the wetware.  

I have seen many people happy with XML Schemas: all of them have used it
very conservatively and all in conjunction with DBMS or 

Rick Jelliffe


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