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Re: [Dbpedia-discussion] DBpedia 3.2 release, including DBpedia Ontology and RDF links to Freebase

From: Kingsley Idehen <kidehen@openlinksw.com>
Date: Mon, 17 Nov 2008 12:30:12 -0500
Message-ID: <4921AA24.6020106@openlinksw.com>
To: Georgi Kobilarov <georgi.kobilarov@gmx.de>
CC: Jens Lehmann <lehmann@informatik.uni-leipzig.de>, public-lod@w3.org, Semantic Web <semantic-web@w3.org>, dbpedia-discussion@lists.sourceforge.net, John Goodwin <John.Goodwin@ordnancesurvey.co.uk>

Georgi Kobilarov wrote:
> Kingsley,
>  
>   
>> What's the URL of the strict one?
>>
>> We are building a DBpedia installer for Virtuoso, so at the very least
>> I
>> want the users of this installer to have choice of "strict" or "loose"
>> infobox extraction.
>>     
>
> Not publicly available yet. There was a buggy first version of "strict",
> but we decided to no further work on it for release 3.2. 
>
>   
Okay.

Kingsley
> Georgi
>
> --
> Georgi Kobilarov
> Freie Universitšt Berlin
> www.georgikobilarov.com
>
>
>   
>> -----Original Message-----
>> From: Kingsley Idehen [mailto:kidehen@openlinksw.com]
>> Sent: Monday, November 17, 2008 6:14 PM
>> To: Jens Lehmann
>> Cc: public-lod@w3.org; Semantic Web; dbpedia-
>> discussion@lists.sourceforge.net; John Goodwin
>> Subject: Re: [Dbpedia-discussion] DBpedia 3.2 release, including
>> DBpedia Ontology and RDF links to Freebase
>>
>> Jens Lehmann wrote:
>>     
>>> Hello John,
>>>
>>> John Goodwin wrote:
>>>
>>>       
>>>> Thanks Chris and team for all your hard work getting this done. I
>>>>         
>> do,
>>     
>>>> however, have a few comments regarding the OWL ontology. I think in
>>>> general the use of domain and range is perhaps a bit "dubious" in
>>>>         
>> that
>>     
>>>> for many things I think it is overly specified. I can imagine
>>>>         
> anyone
>   
>>>> re-using the Dbpedia properties getting some unexpected inferences
>>>>         
>> from
>>     
>>>> the domain and range restrictions. Also the range restriction seem
>>>>         
>> to be
>>     
>>>> done as an OWL intersection so if, for example, something has a
>>>> publisher x then x will be inferred to be both a Company and a
>>>>         
>> Person
>>     
>>>> which is probably not what you want. Personally, in all but a few
>>>>         
>> cases,
>>     
>>>> I'd be tempted to generalise or just remove the domain/range
>>>> restrictions. Any thoughts?
>>>>
>>>>         
>>> We specified the domains and ranges as disjunctions of classes (not
>>> intersection). See the W3C specification of owl:unionOf [1].
>>>
>>> The domain and range axioms help to structure DBpedia and clarify
>>>       
> the
>   
>>> meaning of certain properties. While there is room for improvement,
>>>       
>> it
>>     
>>> is not an option to remove all of them.
>>>
>>> Currently, there are two versions of the infobox extraction: a loose
>>>       
>> one
>>     
>>> and a strict one. In the strict one, it is guaranteed that the data
>>> complies to the ranges specified in the ontology schema. Currently,
>>>       
>> only
>>     
>>> the loose (probably inconsistent) one is provided.
>>>
>>> Kind regards,
>>>
>>> Jens
>>>
>>> [1] http://www.w3.org/TR/owl-guide/#owl_unionOf
>>>
>>>
>>>
>>>       
>> Jens,
>>
>> What's the URL of the strict one?
>>
>> We are building a DBpedia installer for Virtuoso, so at the very least
>> I
>> want the users of this installer to have choice of "strict" or "loose"
>> infobox extraction.
>>
>> --
>>
>>
>> Regards,
>>
>> Kingsley Idehen	      Weblog:
>>     
> http://www.openlinksw.com/blog/~kidehen
>   
>> President & CEO
>> OpenLink Software     Web: http://www.openlinksw.com
>>
>>
>>
>>
>>
>>
>>     
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>   
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>>     
>
>   


-- 


Regards,

Kingsley Idehen	      Weblog: http://www.openlinksw.com/blog/~kidehen
President & CEO 
OpenLink Software     Web: http://www.openlinksw.com
Received on Monday, 17 November 2008 17:30:52 UTC

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