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.

orderItemNumber

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

Thing > Property > orderItemNumber

The identifier of the order item.

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

Schema Version 3.2