- From: Antoine Isaac <aisaac@few.vu.nl>
- Date: Thu, 05 Nov 2009 22:08:14 +0100
- To: Kingsley Idehen <kidehen@openlinksw.com>
- CC: Neubert Joachim <J.Neubert@zbw.eu>, Simon Reinhardt <simon.reinhardt@koeln.de>, SKOS <public-esw-thes@w3.org>, Pat Hayes <phayes@ihmc.us>, dbpedia-discussion@lists.sourceforge.net
Hi Kingsley, >> Sorry for causing some misunderstanding: My point was not that you >> SHOULD use skos:Concept. What I rather wanted to say is that it does >> no harm and that it's already in use for named entites. >> This point arises from the suggestion to use >> skos:exactMatch/closeMatch. These properties are sub-sub-properties of >> skos:semanticRelation, which entails that subject and object of these >> properties are instances of skos:Concept (since skos:Concept are >> domain and range for skos:semanticRelation). >> >> The great advantage of skos:exactMatch/closeMatch (over owl:sameAs) is >> that their semantic doesn't smush the resources with all their >> properties (like the administrative properties you mentioned). > Joachim, > > What do you mean by "smush" are you referring to the union expansion > that results from combing data from all the data sources in the > owl:sameAs relation? I pose my question with the skos:exactMatch > description page URL [1] for context. I see Transitivity and Symmetry, > which are factors re. decision making by reasoners re: union expansion > based on participants in the relation. Note, by "union expansion" I mean > the union of all data associated with the data items in the relation. > > Primarily, I just want clarification about "smushing", relative to the > property definition exposed by the skos:exactMatch URI, more than > anything else. Thus, far I've simply assumed that skos:exactMatch and > owl:sameAs have similar implementation mechanics re. union expansion, Just to clarify it, in case the mails that came after have not done it: using skos:exactMatch should *not* lead to attributing to the two resouces that it relates the union of all data that is attached to them. I don't understand why transitivity and symmetry alone would allow a reasoner to infer such "smushing/union expansion". Let's consider a ex:connectedByARoad property. I can perfectly make it transitive and symmetric, and yet all the towns that this property relates are not one and the same. Antoine > but their use targets vary i.e. skos:exactMatch works better for Concept > Schemes (where the world view assumes Named Entities e.g., "People" > aren't Concepts) while owl:sameAs works better for Named Entities > (people, places, and other typical real more things, so to speak). > > > Links: > > 1. > http://linkeddata.uriburner.com/about/html/http/www.w3.org/2004/02/skos/core%01exactMatch > > > Kingsley >> [SNIP] >> .. >> >> Cheers, Joachim >> >> >> ------------------------------------------------------------------------ >> *Von:* Simon Reinhardt [mailto:simon.reinhardt@koeln.de] >> *Gesendet:* Do 05.11.2009 17:35 >> *An:* Neubert Joachim >> *Cc:* Richard Cyganiak; dbpedia-discussion@lists.sourceforge.net; >> SKOS; Pat Hayes >> *Betreff:* Re: AW: [Dbpedia-discussion] Using DBpedia resources as >> skos:Concepts? >> >> Hi >> >> Neubert Joachim wrote: >> > In my eyes, it's completely ok to use skos:exactMatch or >> skos:closeMatch >> > in a situation like this (I did it myself for the STW Thesaurus for >> > Economics mapping to dbpedia). >> > > Thesauri and classifications are not restricted to abstract concepts. >> > Some thesauri deal explicitly with individual things, e.g. the widely >> > used Getty "Thesaurus of Geographic Names" or "Union List of Artist >> > Names". Other thesauri (like STW) have sections (or facets, as Leonard >> > put it) on geografic names along with others containing "pure" >> concepts. >> > SKOS, as I understand it, is intended to cover all this and to be used >> > beyond strict class hierarchies or class/individual dichotomies. >> >> While I agree that using real-world entities for classification is ok >> I don't think this means you have to declare them to be >> (skos:)concepts. The "has subject" relationship in FRBR [1] for >> example can link a work to a concept but also to places, people, >> events, other works, etc. So in this case you can use real-world >> entities to classify the work (to state what its subjects are) but >> that doesn't mean you declare all those entities to be conceptual. >> >> So in my eyes there's still value in keeping (skos:)concepts and other >> things apart. Concepts to me are closer to classes than to >> individuals. And as Dan pointed out concepts have administrative data >> attached - they get created and changed etc. so they're basically >> units of organisation. >> >> I'd therefore prefer using the UMBEL terms or something else for >> aligning real-world entities and concepts. >> >> > By the way, some of the SKOS properties (especially the >> > prefLabel/altLabel/hiddenLabel semantics) can be useful in a broad >> range >> > of applications. Eg. dbpedia itself could be used as a great source for >> > synonym candidates by mapping the resources to skos:Concept and the >> > labels for dbpedia:redirect resources to skos:altLabel. >> >> Yup, it has a lot of useful annotation terms. They are all declared to >> be annotation properties and deliberately don't have skos:Concept in >> their domain. So you can use them on anything which is great! >> >> Regards, >> Simon >> >> >> [1] http://archive.ifla.org/VII/s13/frbr/frbr_current5.htm#5.2 - >> scroll down to "5.2.3 Subject Relationships" >> >> ------------------------------------------------------------------------ >> >> ------------------------------------------------------------------------------ >> >> Let Crystal Reports handle the reporting - Free Crystal Reports 2008 >> 30-Day trial. Simplify your report design, integration and deployment >> - and focus on what you do best, core application coding. Discover >> what's new with >> Crystal Reports now. http://p.sf.net/sfu/bobj-july >> ------------------------------------------------------------------------ >> >> _______________________________________________ >> Dbpedia-discussion mailing list >> Dbpedia-discussion@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/dbpedia-discussion >> > >
Received on Thursday, 5 November 2009 21:08:48 UTC