core + attic (Attic Area): these terms have been either depricated from the core or extentions, or removed from pending as not accepted into the full vocabulary.

publishedOn

Canonical URL: http://schema.org/publishedOn

Thing > Property > publishedOn

A broadcast service associated with the publication event.

Usage: Between 100 and 1000 domains
Values expected to be one of these types
BroadcastService
Used on these types
PublicationEvent

Schema Version 3.2