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.

playersOnline

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

Thing > Property > playersOnline

Number of players on the server.

Usage: Fewer than 10 domains
Values expected to be one of these types
Integer
Used on these types
GameServer

Schema Version 3.2