PageRelatedField object: Returns a PageField object that represents the field corresponding to the page row source on the many side of the specified one-to-many relationship. Read-only.
PageRelationship object: Returns a PageRowsource object that represents the page row source on the many side of the specified one-to-many relationship. Read-only.
SchemaRelatedField object: Returns the name of the schema field in the schema row source on the many side of the specified one-to-many relationship. Read-only String.
SchemaRelationship object: Returns the name of the schema row source on the many side of the specified one-to-many relationship. Read-only String.