We need Models to describe the World (or just a single Domain). This can be done with the Resource Description Framework Schema
(RDFs) or the Web Ontology Language
(OWL).
In RDFs it is defined/stated what a class really is. The Models are build up with tiny little Sentences, i.e. Facts, consisting out of Subject
, Property
and Object
. These Facts can also be represented in a Graph Representation.
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