semantic-web

The general problem I'm working on a simple ontology, using Protégé 4.3 and trying to create a model such that every instance of a class C has some particular value v , which is an instance of a class V , for a given property p . I can get this inference using an axiom C subClassOf (p value v) but I think I want to be able to state this more along the lines of a C subClassOf (p some V) because I'd actually like each instance of C to be related to every instance of V . A specific example My example is automobiles and actions — I want to create a set of actions for automobiles. When I create new

How can I use the SWI-Prolog Semantic Web Library to make a query into the OWL/RDF file and extract some information? The OWL/RDF file is having information about all the Debian packages so I need to make the query in order to find package dependencies. For Example: The OWL file is structured as follows: package: A Depends: package: B pacakge: C How can I load a OWL/RDF file into a Prolog script and what is the syntax to make a query within the Prolog script such that I put A as a parameter and the script outputs B and C? This is how you load the semweb library: ?- use_module(library(semweb

What semantic web frameworks are there, and what are the advantages / disadvantages of each? I've made extensive use of Jena , and I have looked at Sesame briefly. Are there others I should consider as well? a more low-level appproach is redland , which provides bindings to a lot of languages like Perl, PHP, Python and Ruby. redland itself is written in C. i have scripted with it in ruby to provide a simple webservice with a rdf backend instead of a classic database. Redland is a good RDF framework (just like Andreas said). I am mainly using its Python bindings and am installing it on Mac OS X

I am new to Semantic Web and confused regarding RDFs and Ontology. Can someone explain the difference between RDF Schema and Ontology ? RDF Schema (RDFS) is a language for writing ontologies. An ontology is a model of (a relevant part of) the world, listing the types of object, the relationships that connect them, and constraints on the ways that objects and relationships can be combined. A simple example of an ontology (though not written in RDFS syntax): class: Person class: Project property: worksOn worksOn domain Person worksOn range Project which says that in our model of the world, we