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

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Adi Eio <adieio@gmail.com> writes:

> I was wandering to how can I know the current extent of XML Schema on
> the Web. Because I saw a paper by Mignet et al (2003), that say:
> "conceptual schemas on the XML Web is not yet widespread: only 48% of
> the documents reference DTDs while the number of documents that
> reference XML Schema specifications is insignificant (0.09% of all
> documents)."

Unlike DTDs, documents written to a particular schema are not
_required_ to point to that schema from the document, so although
Google currently reports approximately 4M xml documents of which 590
contain reference to XMLSchema-instance (i.e. .01477 %), which is a
prerequisite for "referencing [an] XML Schema specification", this
figure doesn't actually tell you very much at all about the extent to
which W3C XML Schema is used.

> 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.

 Henry S. Thompson, HCRC Language Technology Group, University of Edinburgh
                     Half-time member of W3C Team
    2 Buccleuch Place, Edinburgh EH8 9LW, SCOTLAND -- (44) 131 650-4440
            Fax: (44) 131 650-4587, e-mail: ht@inf.ed.ac.uk
                   URL: http://www.ltg.ed.ac.uk/~ht/
[mail really from me _always_ has this .sig -- mail without it is forged spam]


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