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Re: Five Stars of Linked Data Vocabulary Use

From: Krzysztof Janowicz <janowicz@ucsb.edu>
Date: Thu, 17 Apr 2014 21:52:03 -0700
Message-ID: <5350AF73.3070402@ucsb.edu>
To: Melvin Carvalho <melvincarvalho@gmail.com>, Pascal Hitzler <pascal.hitzler@wright.edu>
CC: public-lod community <public-lod@w3.org>, "semantic-web@w3.org" <semantic-web@w3.org>
Dear Melvin,

just for clarification, the stars are for linked data vocabulary *use*. 
In fact, this is the 'trick' we had in mind. You earn the stars for 
using vocabularies to describe your data. The number of stars, however, 
depends on certain criteria that these vocabularies have to fulfill and 
this is where your question below comes into play.

Using those vocabularies will give you at least 2 stars. Now it becomes 
more interesting. Have the developers of these vocabularies established 
relations to other vocabularies (e.g., via reusing them or vocabulary 
alignment), are metadata for those vocabularies available, and so forth. 
What we need right now are not necessarily more sameAs links but 
subClassOf and equivalentClass 'links' between vocabularies to foster 
interoperability, query federation, ease the interpretation of data, and 
so forth.

If we can encourage data publishers to publish linked data, use 
vocabularies to give meaning to these data, use vocabularies that 
improve querying across multiple sources, and are described in terms of 
their scope, maintenance model, contact person, etc, then we have made 
good progress towards making linked data easier to use for a broader 
research community.

Best,
Krzysztof


On 04/17/2014 04:07 PM, Melvin Carvalho wrote:
>
>
>
> On 11 April 2014 03:45, Pascal Hitzler <pascal.hitzler@wright.edu
> <mailto:pascal.hitzler@wright.edu>> wrote:
>
>     An opinion piece re. linked data quality and reusability:
>
>     http://www.semantic-web-__journal.net/content/five-__stars-linked-data-vocabulary-__use
>     <http://www.semantic-web-journal.net/content/five-stars-linked-data-vocabulary-use>
>
>
>     (Semantic Web journal)
>
>     All comments and feedback welcome.
>
>
> Interesting paper.
>
> It would have been nice to have some examples.
>
> So where would common vocabularies rank on the star list?
>
> e.g.
>
> FOAF
> Dublin Core
> Schema.org
> Good Relations
> DBPedia
> DOAP
>
> All 5 star?
>
>
>     Best Regards,
>
>     Pascal.
>     --
>     Prof. Dr. Pascal Hitzler
>     Dept. of Computer Science, Wright State University, Dayton, OH
>     pascal@pascal-hitzler.de <mailto:pascal@pascal-hitzler.de>
>     http://www.pascal-hitzler.de
>     Semantic Web Textbook: http://www.semantic-web-book.__org
>     <http://www.semantic-web-book.org>
>     Semantic Web Journal: http://www.semantic-web-__journal.net
>     <http://www.semantic-web-journal.net>
>
>
>


-- 
Krzysztof Janowicz

Geography Department, University of California, Santa Barbara
5806 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 Friday, 18 April 2014 04:52:55 UTC

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