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)))