Editing Entity–relationship model (section)

=== Semantic model ===
A semantic model is a model of concepts and is sometimes called a "platform independent model". It is an intensional model. At least since [[Rudolf Carnap|Carnap]], it is well known that:<ref>{{Cite web|url=https://www.researchgate.net/publication/249853469|title=The Role of Intensional and Extensional Interpretation in Semantic Representations }}</ref> 
:''"...the full meaning of a concept is constituted by two aspects, its intension and its extension. The first part comprises the embedding of a concept in the world of concepts as a whole, i.e. the totality of all relations to other concepts. The second part establishes the referential meaning of the concept, i.e. its counterpart in the real or in a possible world".''