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

Hi All,

I agree with Krzysztof and Mike.

If the main use case is the extraction of quality data from Wikipedia, then maybe the requirements for this use case could be further described and specified (in some dedicated document?).
And also the requirements for the tools (for instance, recommending ontology properties for the people that do the mappings so they do not create new ones if there are already existing the ones that could be adequately used?)

Best,
Agnieszka 


Wiadomość napisana przez Krzysztof Janowicz <janowicz@ucsb.edu> w dniu 2 mar 2015, o godz. 03:25:

> Hi,
> 
>> My counsel is to not let DBpedia's mission stray into questions of conceptual "truth". Keep the ontology flat and simple with no aspirations other than "just the facts, ma'am". 
> 
> I would not necessarily state it this way as the quality and the expressibility of a large ontology such as the DBpedia ontology are key, but I share your feeling about keeping this an information science ontology instead of a philosophical ontology that aims at answering questions about what exists in 'reality'. Information science ontologies should aim at making these differences explicit, not at defining 'truth'. I would also be very careful not to develop this into any sort of 'top-level' ontology or use a pre-fixed alignment to a particular ontology. Generally, I hope a new DBpedia ontology would be following the principle of minimal ontological commitments and may be even developed based on ontology design patterns.
> 
> Best,
> Krzysztof
> 
> 
> 
> On 02/25/2015 09:19 PM, Mike Bergman wrote:
>> Hi John,
>> 
>> My thoughts are for DBpedia to stay close to the mission of extracting quality data from Wikipedia, and no more. That quality extraction is an essential grease to the linked data ecosystem, and of much major benefit to anyone needful of broadly useful structured data.
>> 
>> I think both Wikipedia and DBpedia have shown that crowdsourced entity information and data works beautifully, but the ontologies or knowledge graphs (category structures) that emerge from these effort are mush.
>> 
>> DBpedia, or schema.org from that standpoint, should not be concerned so much about coherent schema, computable knowledge graphs, ontological defensibility, or any such T-Box considerations. They have demonstrably shown themselves to not be strong in these suits.
>> 
>> No one hears the term "folksonomy" any more because all initial admirers have seen no crowd-sourced schema to really work (from dmoz to Freebase). A schema is not something to be universally consented, but a framework by which to understand a given domain. Yet the conundrum is, to organize anything globally, some form of conceptual agreement about a top-level schema is required.
>> 
>> Look to what DBpedia now does strongly: extract vetted structured data from Wikipedia for broader consumption on the Web of data.
>> 
>> My counsel is to not let DBpedia's mission stray into questions of conceptual "truth". Keep the ontology flat and simple with no aspirations other than "just the facts, ma'am".
>> 
>> Thanks, Mike
>> 
>> On 2/25/2015 10:33 PM, M. Aaron Bossert wrote:
>>> John,
>>> 
>>> You make a good point...but are we talking about a complete tear-down of the existing ontology?  I'm not necessarily opposed to that notion, by want to make sure that we are all in agreement as to the scope of work, as it were.
>>> 
>>> What would be the implications of a complete redo?  Would the benefit outweigh the impact to the community?  I would assume that there would be a ripple effect across all other LOD datasets that map to dbpedia, correct?  Or am I grossly overstating/misunderstanding how interconnected the ontology is?
>>> 
>>> Vladimir, your thoughts?
>>> 
>>> Aaron
>>> 
>>>> On Feb 25, 2015, at 21:14, John Flynn <jflynn12@verizon.net> wrote:
>>>> 
>>>> It seems the first level effort should be a requirements analysis for the
>>>> Dbpedia ontology.
>>>> - What is the level of expressiveness needed in the ontology language- 1st
>>>> order logic, some level of descriptive logic, or a less expressive language?
>>>> - Based on the above, what specific ontology implementation language should
>>>> be used?
>>>> - Should the Dbpedia ontology leverage an existing upper ontology, such as
>>>> SUMO, DOLCE, etc?
>>>> - Should the Dbpedia ontology architecture consist of a basic common core of
>>>> concepts (possibly in addition to the concepts in a upper ontology) that are
>>>> then extended by additional domain ontologies?
>>>> - How will the Dbpedia ontology be managed?
>>>> - What are the hosting requirements for access loads on the ontology? How
>>>> many simultaneous users?
>>>> 
>>>> This is only a cursory cut at Dbpedia ontology requirement issues. But, it
>>>> seems the community needs to come to grips with this issue before
>>>> implementing specific changes to the existing ontology.
>>>> 
>>>> John Flynn
>>>> http://semanticsimulations.com
>>>> 
>>>> -----Original Message-----
>>>> From: M. Aaron Bossert [mailto:mabossert@gmail.com]
>>>> Sent: Wednesday, February 25, 2015 9:13 AM
>>>> To: <vladimir.alexiev@ontotext.com>
>>>> Cc: dbpedia-ontology; Linked Data community; SW-forum;
>>>> <dbpedia-discussion@lists.sourceforge.net>
>>>> Subject: Re: [Dbpedia-ontology] [Dbpedia-discussion] Advancing the DBpedia
>>>> ontology
>>>> 
>>>> Vladimir,
>>>> 
>>>> I'm thinking of trying to do some stats on the existing ontology and the
>>>> mappings to see where there is room for improvement.  I'm tied up this week
>>>> with a couple deadlines that I seem to moving towards at greater than light
>>>> speed, though my progress is not.
>>>> 
>>>> As soon as I get the rough cut done, I'll share the results with you and
>>>> maybe we can discuss paths forward?
>>>> 
>>>> I'm with you on the 30% error rate...that doesn't help anyone.
>>>> 
>>>> Aaron
>>>> 
>>>> 
>>>> 
>>> 
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>>> 
>> 
>> 
>> 
> 
> 
> -- 
> Krzysztof Janowicz
> 
> Geography Department, University of California, Santa Barbara
> 4830 Ellison Hall, Santa Barbara, CA 93106-4060
> 
> Email: jano@geog.ucsb.edu
> Webpage: http://geog.ucsb.edu/~jano/
> Semantic Web Journal: http://www.semantic-web-journal.net
> 
>

Received on Monday, 2 March 2015 09:15:44 UTC