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Fwd: Metadata statistics from Yahoo! Search

From: Daniel Park <soohongp@gmail.com>
Date: Wed, 18 Apr 2012 09:37:55 +0900
Message-ID: <CAHSr+v0J=X1LHC7WimFV23Tyu4pckJ7GzeWh2z3bLi3QmB5FaA@mail.gmail.com>
To: public-media-annotation@w3.org

as long as contents are generated on the web, metadata issue is
forever, and our mapping MUST be expanded accordingly.
let's see how we can cope with this new metadata dataset from our
mapping perspective.

any idea or thought ?

Regards, Daniel.

---------- Forwarded message ----------
From: Peter Mika <pmika@yahoo-inc.com>
Date: Wed, Apr 18, 2012 at 12:06 AM
Subject: Metadata statistics from Yahoo! Search
To: "public-vocabs@w3.org" <public-vocabs@w3.org>, "public-lod@w3.org"

Hi All,

To add one more data point to the previous discussion about
webdatacommons.org, we have recently presented a short position paper
at the LDOW 2012 workshop at WWW 2012. Online at


Please compare this carefully with the results of Bizer et al.:


As it always the case with statistics, it matters what you count on
and how you count ;) For example, Chris and his co-authors did not
consider most of OGP data on the Web, which results in large
discrepancies in the counts for RDFa, as well as overall counts.

Nevertheless, both studies confirm that the Semantic Web, and in
particular metadata in HTML, is taking on in major ways thanks to the
efforts of Facebook, the sponsors of schema.org and many other
individuals and organizations. Comparing to our previous numbers, for
example we see a five-fold increase in RDFa usage with 25% of webpages
containing RDFa data (including OGP), and over 7% of web pages
containing microdata. These are incredibly impressive numbers, which
illustrate that this part of the Semantic Web has gone mainstream.


Soohong Daniel Park
Samsung Electronics, SWC
Received on Wednesday, 18 April 2012 00:38:27 UTC

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