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Re: http://ld2sd.deri.org/lod-ng-tutorial/

From: Dan Brickley <danbri@danbri.org>
Date: Tue, 23 Jun 2009 09:13:06 +0200
Message-ID: <4A408082.2060501@danbri.org>
To: hepp@ebusiness-unibw.org
CC: Yves Raimond <yves.raimond@gmail.com>, martin.hepp@ebusiness-unibw.org, Michael Hausenblas <michael.hausenblas@deri.org>, Richard Cyganiak <richard@cyganiak.de>, "Hepp, Martin" <mhepp@computer.org>, Hugh Glaser <hg@ecs.soton.ac.uk>, mark.birbeck@webbackplane.com, "Booth, David (HP Software - Boston)" <dbooth@hp.com>, "public-lod@w3.org" <public-lod@w3.org>
On 22/6/09 23:16, Martin Hepp (UniBW) wrote:
> Yves Raimond wrote:
>>> Ontology modularization is
>>> a pretty difficult task, and people use various heuristics for deciding what
>>> to put in the subset being served for an element. There is no guarantee that
>>> the fragment you get contains everything that you need.

> There is no safe way of importing only parts of an ontology, unless you
> know that its modularization is 100% reliable.
> Serving fragments of likely relevant parts of an ontology for reducing
> the network overhead is not the same as proper modularization of the
> ontology.

Can you give a concrete example of the danger described here? ie. the 
pair of a complete ("safe") ontology file and a non-safe subset, and an 
explanation of the problems caused.

I can understand "there is no guarantee that the fragment you get 
contains everything you need", and I also remind everyone that 
dereferencing is a privilege not a right: sometimes the network won't 
give you what you want, when you want it. But I've yet to hear of anyone 
who has suffered due to term-oriented ontology fragment downloads. I 
guess medical ontologies would be the natural place for horror stories?


Received on Tuesday, 23 June 2009 07:13:46 UTC

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