A journal is an archival periodical publication. Note that a journal is not the same as a journal article or a reference to an article. A journal is a document; a particular issue of a journal may contain several articles.
(Subclass-Partition Periodical-Publication (Setof Journal Magazine Newspaper)) (Inherited-Facet-Value Slot-Value-Type Journal-Article-Reference Ref.Document Journal) (=> (Journal-Article-Reference ?Ref) (And (Value-Type ?Ref Ref.Document Journal) (Value-Cardinality ?Ref Ref.Month 0)))