When a reference is a one-to-one account of a document, then the year in the reference (ref.year) is the year of publication of the document. This relation captures this relationship.
(Same-Slot-Values Inherits-Year-From-Document
Ref.Year
(Compose Timepoint.Year
Doc.Publication-Date
Ref.Document))
(<=> (Inherits-Year-From-Document ?Ref)
(And (Publication-Reference ?Ref)
(Same-Values ?Ref
Ref.Year
(Compose Timepoint.Year
Doc.Publication-Date
Ref.Document))))