|AKT : A publication is something which has one or more publication references. A publication can be both an article in a journal or a journal itself. The distinction between publication and publication-reference makes it possible to distinguish between multiple occurrences of the same publication, for instance in different media.
++Philosurfical: this reflects out model, since a reference is an expression, while the publication is a manifestation. The has-abstract and has-date slots have been removed.
Class(PUBLICATION partial MANIFESTATION
Class Description/Definition (Necessary Conditions)