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Re: OWL equivalentClass question

From: Michael Schneider <schneid@fzi.de>
Date: Sun, 15 Jul 2012 14:19:30 +0200
Message-ID: <5002B552.8040607@fzi.de>
To: Pat Hayes <phayes@ihmc.us>
CC: Alan Ruttenberg <alanruttenberg@gmail.com>, David Booth <david@dbooth.org>, <semantic-web@w3.org>
Am 15.07.2012 04:52, schrieb Pat Hayes:

> There is a strong contingent of 'linked data" enthusiasts
> who want RDF to be blank-node-free, and this skolemization
> stuff is there partly to keep them (and the developers who
> make tools for them to use) happy.

As a warm-up, our linked-data enthusiasts may want to start with 
skolemizing the Billion Triple Challenge (BTC) Dataset. According to 
[1], in the BTC 2010, of the 192 Million distinct "resource-objects" 
(defined as both URIs and blank nodes), 97 Million of them (that is, 
half of them!) were blank nodes (more precisely: distinct blank node 
identifiers).

Seems that the Semantic Web is still quite polluted with blank nodes, 
and it will probably need quite some enthusiasm, to skolemize them all 
away - and probably also quite some checking to make sure that nothing 
relevant gets broken by this effort...

[1] <http://gromgull.net/blog/2010/09/btc2010-basic-stats/>

Michael

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Dipl.-Inform. Michael Schneider
Research Scientist, IPE / WIM

FZI Forschungszentrum Informatik
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michael.schneider@fzi.de
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Received on Sunday, 15 July 2012 12:19:55 UTC

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