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Re: [Dbpedia-ontology] [Dbpedia-discussion] Advancing the DBpedia ontology

From: Peter F. Patel-Schneider <pfpschneider@gmail.com>
Date: Wed, 18 Feb 2015 06:02:00 -0800
Message-ID: <54E49B58.4030507@gmail.com>
To: vladimir.alexiev@ontotext.com, 'dbpedia-ontology' <dbpedia-ontology@lists.sourceforge.net>
CC: 'Linked Data community' <public-lod@w3.org>, 'SW-forum' <semantic-web@w3.org>, dbpedia-discussion@lists.sourceforge.net
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I agree that there are problems with the mappings.  However, how can the
mappings be fixed without fixing the ontology?

peter


On 02/18/2015 05:03 AM, Vladimir Alexiev wrote:
> Hi everyone!
> 
> My presentations from the Dublin meeting are at
> 
> -
> http://VladimirAlexiev.github.io/pres/20150209-dbpedia/add-mapping-long.html
>
> 
An example of adding a mapping, while making a couple props along the way and
reporting a couple of problems.
> 
> -
> http://VladimirAlexiev.github.io/pres/20150209-dbpedia/dbpedia-problems-long.html
>
> 
Provides a wider perspective that data problems are not only due to the
ontology, but many other areas.
> 3. Mapping Language Issues 4. Mapping Server Deficiencies 5. Mapping Wiki
> Deficiencies 6. Mapping Issues 7. Extraction Framework Issues 8. External
> Mapping Problems 9. Ontology Problems Almost all of these are also
> reported in the two trackers described in sec.2
> 
>> Heiko Paulheim <heiko@informatik.uni-mannheim.de> wrote: I am currently
>> working with Aldo Gangemi on exploiting the mappings to DOLCE (and the
>> high level disjointness axioms in DOLCE) for finding modeling issues
>> both in the instances and the ontology.
> 
> Sounds very interesting!
> 
> I've been quite active in the last couple of months, but I've been
> pecking at random here and there. More systematic approaches are
> definitely needed, as soon as they are not limited to a theoretical
> experiment, or a one-time effort that's quickly closed down.
> 
> I've observed many error patterns, and if people smarter than me can
> devise ways to leverage and amplify these observations using algorithmic
> or ML approaches, that could create fast progress. I give some examples
> of the "Need for Research" of specific problems: 
> http://VladimirAlexiev.github.io/pres/20150209-dbpedia/dbpedia-problems-long.html#sec-6-5
>  and next section.
> 
>> Harald Sack: apply the DBpedia ontology to detect inconsistencies and
>> flaws in DBpedia facts. This should not only be possible in a
>> retroactive way, but should take place much earlier. Besides the
>> detection of inconsistencies during the mapping process or afterwards
>> in the extracted data
> 
> Sounds very promising! If I can help somehow with "manual ontological &
> wiki labor", let me know. Data vs ontology validation can provide -
> mapping defect lists - useful hints that the Extraction can use. The most
> important feature would be Use Domain & Range to Guide Extraction 
> http://vladimiralexiev.github.io/pres/20150209-dbpedia/dbpedia-problems-long.html#sec-7-4
>
> 
>> this could already be possible right from the start when the user is
>> changing the wikipedia infobox content (in the sense of type checking
>> for domain/range, checking of class disjointness and further
>> constraints, plausibility check for dates
> 
> I'm doubtful of the utility of "error lists" to Wikipedia (or it needs to
> be done with skill and tact): 1. The mapping wiki adopts an Object vs
> DataProp Dichotomy (uses owl:ObjectProperty and owl:DatatypeProperty and
> never rdf:Property). But MANY Wikipedia fields include both links and
> text, and in many cases BOTH are useful 
> http://vladimiralexiev.github.io/pres/20150209-dbpedia/dbpedia-problems-long.html#sec-3-2
>
> 
2. At the end of the day, Wikipedia is highly-crafted text, so telling
Wikipedia editors that they can't write something, will not sit well with them.
> 
> For example, who should resolve this contradiction: DBO: dbo:parent
> rdfs:range dbo:Person Wikipedia: | mother = [[Queen Victoria]] of
> [[England]] I think the Extraction Framework (by filtering out the link
> that is not Person), not Wikipedians
> 
>> a tool that makes inconsistencies/flaws in wikipedia data visible
>> directly in the wikipedia interface, where users could either correct
>> them or confirm facts that are originally in doubt.
> 
> But Wikipedia is moving towards using Wikidata props in template fields:
> through {{#property}}.
> 
> Cheers!
> 
> 
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>
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Received on Wednesday, 18 February 2015 14:02:38 UTC

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