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

customer

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

Thing > Property > customer

Party placing the order or paying the invoice.

Usage: Between 10 and 100 domains
Values expected to be one of these types
Organization
Person
Used on these types
Invoice
Order

Schema Version 3.4