Do this. Also clarify definitions as follows: original-order: The request represents an original authorization for action. Original orders should not have a 'based on' link to any other orders. filler-order: The request represents the view of an authorization instantiated by a fulfilling system representing the details of the fulfiller's intention to act upon a submitted order. Filler orders should have a 'based on' link to another order. Filler orders will generally represent the full scope and timing of the original order, though not always. (Also see 'instance-order'.) instance-order: An order created in fulfillment of a broader order that represents the authorization for a single activity occurrence. E.g. The administration of a single dose of a drug. Instance orders might be defined by either placing or filling systems. Instance orders should have a 'based on' link to another order.