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Re: [DBpedia-discussion] Call for Ontology Editor demos for DBpedia

From: Kingsley Idehen <kidehen@openlinksw.com>
Date: Thu, 6 Jul 2017 16:48:13 -0400
To: Paul Houle <paul.houle@ontology2.com>, 'semantic-web at W3C' <semantic-web@w3c.org>, 'public-lod' <public-lod@w3.org>, 'DBpedia' <Dbpedia-discussion@lists.sourceforge.net>
Message-ID: <0acbd8b0-f15a-1d8a-60de-a297983cf757@openlinksw.com>
On 7/6/17 11:02 AM, Paul Houle wrote:
> I would disagree.
>
> The DBpedia Ontology is not designed to support any specific kind of
> reasoning. 

That's a  bit of an over generalization, don't you think? Here's a
simple ontology exploration example via the following steps:

1. Goto http://dbpedia.org/fct/
2. Type in http://schema.org/Person .

At this juncture you have all instances of schema:Person class as per
the document at:
http://dbpedia.org/describe/?url=http%3A%2F%2Fschema.org%2FPerson&urilookup=1

Jump to the last page i.e., goto:
http://dbpedia.org/describe/?url=http%3A%2F%2Fschema.org%2FPerson&distinct=1&p=1&lp=12434&op=-1&last=&gp=1

In a nutshell, there are some ontological (tbox) relations in place
(e.g., owl:equivalentClass, rdfs:subClassOf etc..) that are useful for
reasoning and inference.


Kingsley



>
> What it *is* designed to do is capture the somewhat structured data
> that exists in Wikipedia.  Following the much misunderstood "semantic
> web",  the emphasis is on properties first,  and then classes second.
>  Think of it as a set of baseball or Pokemon cards;  the point is not
> to replicate or even closely describe the performance or rules of the
> game,  but to go after the long hanging fruit of "things that are easy
> to ontologize."
>
> There is a real price to pay for this;  from the viewpoint of
> conventional application development and introductory computer
> science,  the data is not always factually correct or satisfies the
> invariants required for a particular algorithm.  Practically that
> means that you might ask for "US States" and get 48 or 51,  that
> somebody like Barry Bonds or Mel Gibson has their career much better
> represented than J. Edgar Hoover or J. Eric S. Thompson,  and you
> would probably find that the "tree of life" in DBpedia is not really a
> tree.
>
> If you need to reasoning in some domain you need to find some area you
> are willing to pump the entropy out of,  create the data structures
> appropriate for what you want to do,  and possibly incorporate data
> from DBpedia,  doing whatever cleanup is necessary.  That's not
> different at all from the situation of "doing reasoning over reasoning
> over data collected by a large organization".
>
>
>
> ------ Original Message ------
> From: "John Flynn" <jflynn12@verizon.net <mailto:jflynn12@verizon.net>>
> To: "'Sebastian Hellmann'" <hellmann@informatik.uni-leipzig.de
> <mailto:hellmann@informatik.uni-leipzig.de>>; "'semantic-web at W3C'"
> <semantic-web@w3c.org <mailto:semantic-web@w3c.org>>; "'public-lod'"
> <public-lod@w3.org <mailto:public-lod@w3.org>>; "'DBpedia'"
> <Dbpedia-discussion@lists.sourceforge.net
> <mailto:Dbpedia-discussion@lists.sourceforge.net>>
> Sent: 7/5/2017 11:43:02 AM
> Subject: Re: [DBpedia-discussion] Call for Ontology Editor demos for
> DBpedia
>
>> I have long been curious about the DBpedia ontology structure so I
>> just took a look at the ontology represented in
>> (https://dl.dropboxusercontent.com/u/375401/dbo_no_mappings..nt
>> <https://dl.dropboxusercontent.com/u/375401/dbo_no_mappings.nt>) as
>> referenced in the email below.
>>
>> I normally start the evaluation of an ontology by looking at the
>> top-down class relationships. So, I did a search for the classes that
>> were listed as a direct subclass of owl#Thing to get a general idea
>> of the organization of the DBpedia class structure.
>>
>> To say the least, I was sorely disappointed. Here are a few of the
>> DBpedia classes that are direct subclasses of owl#Thing: Food, Media,
>> Work, Blazon, Altitude, Language, Currency, Statistic, Diploma,
>> Award, Agent, PublicService, Disease, GrossDomesticProdutPerCapita,
>> ElectionDiagram, Demographics, Relationship, Medicine, List,
>> BioMolecule. I gave up after this small sample. It is obvious that
>> the DBpedia community needs to worry a lot more about the structure
>> of the ontology itself rather than focusing on selecting a new
>> editor. A working group needs to be established to go back to the
>> drawing board and look at the DBpedia ontology form the top down. It
>> certainly doesn't make much sense as it is currently structured.
>>
>>  
>>
>> John Flynn
>>
>> http://semanticsimulations.com
>>
>>  
>>
>> *From:*Sebastian Hellmann [mailto:hellmann@informatik.uni-leipzig.de
>> <mailto:hellmann@informatik.uni-leipzig.de>]
>> *Sent:* Wednesday, July 05, 2017 10:43 AM
>> *To:* 'semantic-web at W3C'; public-lod; DBpedia
>> *Subject:* [DBpedia-discussion] Call for Ontology Editor demos for
>> DBpedia
>>
>>  
>>
>> Dear all,
>>
>> we are preparing a switch from the mappings wiki
>> (http://mappings.dbpedia.org) to another ontology editor and started
>> to collect requirements/tools here:
>>
>> https://docs.google.com/document/d/1HwtJJ3jIlrQAPwHYhvpw4a4Z4hZorTGaZTB8Bq8Y-TI/edit
>>
>> We already have a demo for Webprotege thanks to Ismael Rodriguez, our
>> GSoC student. As we are lacking time and resources, we will probably
>> only consider editors with a running demo, so the community can try it.
>>
>> Our main interest is of course to manage the DBpedia core ontology
>> and push any mappings to other ontologies in separate files. So we
>> provide a core version for demo purposes created with:
>> rapper -g dbpedia_2016-10.nt | grep -v
>> '\(http://schema.org\|http://www.wikidata.org\|http://www.ontologydesignpatterns.org\
>> <http://schema.org/%7Chttp:/www.wikidata.org/%7Chttp:/www..ontologydesignpatterns.org/>)'
>> > dbo_no_mappings.nt
>>
>> https://dl.dropboxusercontent.com/u/375401/dbo_no_mappings.nt
>> (I hope that the regex didn't kick out anything essential or broke
>> any axioms...)
>>
>> We would be very happy, if anyone from the semantic web community
>> would make a demo with their favorite editor and add a link to the
>> Google Doc and post a short message on the DBpedia discussion list[1]
>> or on slack https://dbpedia.slack.com/ .
>>
>> This would help us to make a more informed decision. The next DBpedia
>> Dev online meeting will be on 2nd of August 14:00 (each first
>> Wednesday per month). Presentations of editors are also welcome. We
>> will also discuss the editor question during the DBpedia meeting in
>> Amsterdam, co-located with SEMANTiCS on 14.9.
>> http://wiki.dbpedia.org/meetings/Amsterdam2017
>>
>> Thank you for your help!
>>
>> [1] https://sourceforge.net/projects/dbpedia/lists/dbpedia-discussion
>>
>> -- 
>> All the best,
>> Sebastian Hellmann
>>
>> Director of Knowledge Integration and Linked Data Technologies (KILT)
>> Competence Center
>> at the Institute for Applied Informatics (InfAI) at Leipzig University
>> Executive Director of the DBpedia Association
>> Projects: http://dbpedia.org, http://nlp2rdf.org,
>> http://linguistics..okfn.org <http://linguistics.okfn.org>,
>> https://www.w3..org/community/ld4lt <http://www.w3.org/community/ld4lt>
>> Homepage: http://aksw.org/SebastianHellmann
>> Research Group: http://aksw.org
>>

-- 
Regards,

Kingsley Idehen	      
Founder & CEO 
OpenLink Software   (Home Page: http://www.openlinksw.com)

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Received on Thursday, 6 July 2017 20:48:42 UTC

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