the expected type of the object referred to by this property

the forward property that controls this property. All properties using the master property are mirrored by this property.

if this is true, the property can point to only one object. By default, properties can point to multiple objects.

this lists the property that mirrors this property from the expected type. A property should not have both master_property and reverse_property.

the link from a property to its underlying type. This forces a property to only belong to a single type.

if this is true, the property's write access is restricted to the permission of the property's schema