How to perform RDF ontology matching

Question

What is the best way to perform the matching between two ontologies so that I can get a similarity score between the two ontologies which can make the job of integration easy (integration of data from different RDF)

Answer 1

There are several ways of mapping triples to an ontology. You can do it in Protégé, use SPARQL constructs, SWRL rules or do it with a programming library like Jena and RDFlib. I would choose the approach you are most familiar with. If that is Jena, I would do that. There you can use several of Jena's mapping functions to do most of the work for you. Just check the Jena API for reference.

Personally I think the best way and the most safest way is to use Protégé, but for a quicker and more hackier solution a SPARQL contruct might work. Like this example:

CONSTRUCT {
    ?lexicon vso:fuelType ?fuel .
    ?fuel a gr:QualitativeValue .
} WHERE {
    [ co:lexicon ?lexicon ;
        co:confVarId "PT1628" ;
        co:hasValue ?fuel ] .
}

Here I want to turn a lexicon entry into a Qualitative value object and set the lexicon to have a property fuelType to this object.