The year of the unique ID

Jack forwarded that one. JOHO stands for "Journal of Hyperlinked Organization". Food for thought based on the ISBN case. What does isbn:foo identifies?

Work (e.g., Hamlet)

Expression (e.g., the Folger's Hamlet with annotations and introduction)

Manifestation (a particular print run of Folger's Hamlet)

Item (a copy of Folger's Hamlet sitting on a shelf)

Work, expression, manifestation, item : four aspects, in four different perspectives, of the same hubject isbn:foo