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Beyond the issue of lying metadata, there's a much more important
distinction between metadata based search engines like the semantic
web and data based engines like Google. Providing metadata requires
extra effort which is roughly proportional to the quality and amount
of the metadata to be provided. There is a noticeable cost for a site
to add metadata. By contrast, there is negligible cost to provide
data for Google because this is the same data you're providing
anyway. Metadata isn't free. The semantic web is going to need to
provide really significant benefits to content authors to justify the
added costs of supplying useful metadata. Even if it does, I wouldn't
be surprised if much metadata is created by tools that screenscrape
the data and thus guess the appropriate metadata.
--
Elliotte Rusty Harold
elharo@metalab.unc.edu
Effective XML (Addison-Wesley, 2003)
http://www.cafeconleche.org/books/effectivexml
http://www.amazon.com/exec/obidos/ISBN%3D0321150406/ref%3Dnosim/cafeaulaitA
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