Re: Modeling of Services in GoodRelations / WasRe: e-triples

Thanks Martin, nice to hear the thinking behind the design choices.

2009/9/10 Martin Hepp (UniBW) <martin.hepp@ebusiness-unibw.org>:
> Dear Danny:
> Apologies for the delay ;-)
>>
>> Looking again at the vocab, the only significant part I'd do
>> differently is ProductOrService (and similarly structured related
>> classes). While in the context of selling stuff this combination fits
>> well, there are big differences nearby, e.g. physical characteristics,
>> means of delivery.
>>
>>
>
> You are right, gr:ProductsAndServices and its subclasses combine objects of
> two different kinds - basically,
> - objects - "things that can be claimed to exist" (Proton)
> - happings
>
> Products are basically all objects on which property rights can be obtained
> and transferred, while Services are basically happenings that take place in
> the favor of someone and.
>
> So the natural modeling would be a class gr:Product and a class gr:Service.
>
> GoodRelations uses gr:ProductOrService, which is union of those two classes,
> because with many important data sources, it is difficult to distinguish the
> products from the services automatically and reliably. Remember, we often
> have shop systems with several 100k items, and very often a few percent of
> the entries are services.
>
> It is basically a trade-off decision between the ease of populating the
> ontology vs. maximizing the reuse of the data.
>
> See also
>
> http://www.heppnetz.de/files/iswc-lightning-talk-hepp3.png
>
> Another reason is that from the commercial perspective, there are many
> properties that are to be attached to both products and services, so we need
> the superclass anyway.
>
> I expect now a lot of counterarguments from people who worked on
> fine-grained modeling of services ;-) Before anybody sends flames, please
> note that GoodRelations aims at services only insofar as "commodity
> services", like hairdressing, waste disposal, cleaning, etc. is concerned.
>
> Best
> Martin
>
> PS: See recent stats on GoodRelations adoption at
> http://pingthesemanticweb.com/stats/types.php
>
>
> --
> --------------------------------------------------------------
> martin hepp
> e-business & web science research group
> universitaet der bundeswehr muenchen
>
> e-mail:  mhepp@computer.org
> phone:   +49-(0)89-6004-4217
> fax:     +49-(0)89-6004-4620
> www:     http://www.unibw.de/ebusiness/ (group)
>        http://www.heppnetz.de/ (personal)
> skype:   mfhepp twitter: mfhepp
>
> Check out GoodRelations for E-Commerce on the Web of Linked Data!
> =================================================================
>
> Webcast:
> http://www.heppnetz.de/projects/goodrelations/webcast/
>
> Recipe for Yahoo SearcMonkey:
> http://tr.im/rAbN
>
> Talk at the Semantic Technology Conference 2009: "Semantic Web-based
> E-Commerce: The GoodRelations Ontology"
> http://tinyurl.com/semtech-hepp
>
> Overview article on Semantic Universe:
> http://tinyurl.com/goodrelations-universe
>
> Project page:
> http://purl.org/goodrelations/
>
> Resources for developers:
> http://www.ebusiness-unibw.org/wiki/GoodRelations
>
> Tutorial materials:
> CEC'09 2009 Tutorial: The Web of Data for E-Commerce: A Hands-on
> Introduction to the GoodRelations Ontology, RDFa, and Yahoo! SearchMonkey
> http://tr.im/grcec09
>
>



-- 
http://danny.ayers.name

Received on Friday, 11 September 2009 07:58:41 UTC