An identifier for a schema property for specifying labels along with the reference to the property. This is useful for specifying a label for a property reference that uses a json path, where the label of the underlying property might not be descriptive enough at the top-level object.
An optional label for the property. This will be used in locations where the label appears with the property.
If set to '', the label will be omitted.
The value of the property to reference. Can be either an exact property name or a json path.