- From: Umutcan ŞİMŞEK <s.umutcan@gmail.com>
- Date: Fri, 15 Mar 2013 22:37:46 +0200
- To: Alan Ruttenberg <alanruttenberg@gmail.com>
- CC: Jeremy J Carroll <jjc@syapse.com>, Kingsley Idehen <kidehen@openlinksw.com>, public-semweb-lifesci@w3.org
- Message-ID: <5143869A.8060409@gmail.com>
As I read your detailed answers and dug into web about the issue, I started to get how big deal is this. Seperation of description of a thing and thing's itself seems a better and easier to get solution. I don't think I will have a big problem for lodd but for further works I may have. Here that I could find a compilation about this topic which might be useful: http://ontologydesignpatterns.org/wiki/Community:Overloading_OWL_sameAs On 15-03-2013 21:56, Alan Ruttenberg wrote: > There's another perspective, which is to to distinguish descriptions > of things from the things themselves. This works if you can agree on > identity of the thing but not necessarily on the way to describe it. > As an example, consider the class of cars manufactured by Nissan (call > it Cn). If you can agree on a URI for that class, you can each write > descriptions that have foaf:primaryTopic Cn. > > Depending on how careful you want to be, you can then use one or two > graphs. If you have your predicate relate descriptions then you can > use a single graph. For example instead of having a predicate > hasNumberOfDoors that relates cars to a count of doors you can > have describedHasNumberOfDoors that relates a description of a car to > a number with the interpretation that the author of the description > asserts that the car has 4 doors. > > Or, if you want to make assertions about the car, then use two graphs. > Each can make statements of the sort [isPrimaryTopicOf <description>] > hasNumberOfDoors 4. Since we are talking now about the cars, there > could be different perspectives, so to control that you put each > author's assertions in a different graph. > > I think this is a better strategy than using sameAs. There are a bunch > of problems with sameAs, not least of which is that often the > assertions are incorrect - they mean something different, Jim's post > gives a strategy to relate them without using sameAs, but I'd assert > that general ways of relating descriptions takes more than a couple of > relations, and should be an orthogonal problem. With the primaryTopic > method I suggest the relationship that matters for your application - > that the descriptions are pointing to the same thing, is explicit, and > doesn't need new predicates, though it does require some level of > coordination. > > Best, > Alan > > On Fri, Mar 15, 2013 at 2:55 PM, Umutcan ŞİMŞEK <s.umutcan@gmail.com > <mailto:s.umutcan@gmail.com>> wrote: > > That made it clear, thanks again. I'm sure it will be helpful for > other developers either in the future. > > Umutcan > > > On 15-03-2013 20:29, Jeremy J Carroll wrote: > > I did not find this a rookie question at all. > > This seems to get to the heart of some of the real difficult > issues in Semantic Web. > > My perspective is different from yours, and a resource > description that I author is a description of the resource > from my perspective; a resource description that you author is > a description from your perspective. > > If I have some detailed application that depends in some > subtle way on my description, I may want to ignore your > version; on the other hand, a third party might want to use > both of our points of view. > > One way of tacking this problem is to have three graphs for > this case: > > Gj, Gu, G= > > Gj contains triples describing my point of view > Gu contains triples describing your point of view > G= contains the owl:sameAs triples > > Then, in some application contexts, we use Gj, sometimes Gu, > and sometimes all three. > > Jeremy > > > > > On Mar 15, 2013, at 11:02 AM, Umutcan ŞİMŞEK > <s.umutcan@gmail.com <mailto:s.umutcan@gmail.com>> wrote: > > Thanks for the quick answer : ) > > So this issue is that subjective for contexts which allows > to use owl:sameAs to link resources if they are not > semantically even a little bit related in real world? > > Sorry if I'm asking too basic questions. I'm still a > rookie at this :D > > Umutcan > > > On 15-03-2013 19:38, Kingsley Idehen wrote: > > On 3/15/13 1:05 PM, Umutcan ŞİMŞEK wrote: > > My question is, does LODD use owl:sameAs properly? > For instance, are those two resources, > dbpedia:Metamizole and drugbank:DB04817 (code for > Metamizole), really identical? Or am I getting the > word "property" in the paper wrong? > > The question is always about: do those URIs denote the > same thing? Put differently, do the two URIs have a > common referent? > > ## Turtle ## > > <#i> owl:sameAs <#you>. > > ## End ## > > That's a relation in the form of a 3-tuple based > statement that carries entailment consequences for a > reasoner that understand the relation semantics. > Through some "context lenses" the statement above > could be accurate, in others totally inaccurate. > > Conclusion, beauty lies eternally in the eyes of the > beholder :-) > > > > >
Received on Friday, 15 March 2013 20:38:18 UTC