owl

I created an ontology that contains the class Blood_Sugar this class contains 4 subclasses: Normal_BS, High_BS, Low_BS and Dangerous_BS. I would like to execute a SWRL rule on Protege 3.4.8 which permit to classify individuals of the supere class Blood_Sugar in subclasses according to their values. Blood_Pressure(?x) ∧ hasLevelvalue(?x, ?y) ∧ swrlb:greaterThan(?y, 126) ∧ swrlb:lessThan(?y, 500) → High_BS(?x) knowing that hasLevelValue is a DataType proprety, its domain is Blood_Sugar class and its range is INT On the Blood_Sugar class and thier subclasses class, I created the restriction

I am trying to grasp the concept of Semantic Web. I am finding it hard to understand what exactly is the difference between RDF and OWL. Is OWL an extension of RDF or these two are totally different technologies? Christopher Gutteridge The semantic web comes in layers. This is a quick summary of the ones I think you're interested in. Update : Please note that RDFS is used to define the structure of the data, not OWL. OWL describes semantic relationships which normal programming, such as a C struct, isn't fussed about and is closer to AI research & set theory. Triples & URIs Subject - Predicate

I want to query all subclass of Nicotine (product). the result must be (Nasal form nicotine, Oropharyngeal from ni ..(4 items).. see in the picture) i try to query by rdfs:subClassOf+ and owl:equivalentClass+ but didn't work try from this example the code same here. PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> PREFIX owl: <http://www.w3.org/2002/07/owl#> PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> SELECT * WHERE { ?s owl:equivalentClass+ ?o . # and try ?s rdfs:subClassOf ?o filter(?s=<http://snomed.info/id/323283001>) } this image from protege Thank. The first query hard

I need to infer that one individual is the brother of other one if they have the same father. So, if I have this: Bart hasFather Homer. Lisa hasFather Homer. Because Bart and Lisa have the same father, I would like to infer: Lisa hasBrother Bart. Is there any method to do that using any property characteristics? Joshua Taylor Use Property Chains and Rolification Antoine Zimmermann's answer is a very good start to this problem, and touches on the major point that you need to solve this sort of task: From x to each of x 's brothers, there is a path of the form hasFather o hasFather -1 . Now,

I'm looking for a library that can deal with RDF and OWL data. So far I have found: semweb (no owl support for all I know) rowlex (more of a 'browser' application) Your recommendations: LinqToRdf (very interesting, thanks mark!) ROWLEX is actually very cool (uses SemWeb internally). It is not just a browser app but rather an SDK written in C#. If you use ROWLEX, you do not directly interact with the tripples of RDF anymore (though you can), but gives an object oriented look&feel. There are two main usage scenarios: Business class first: You have your .NET business classes. You declaratively