 generalized in terms of four
    stages: creating the request, sending the request, receiving acceptance or refusal of the request, and fulfillment
    of the request. A characteristic (but non-exhaustive) set of states for the request/order pattern include:</p>

  <ul>
    <li>proposed: An actor (e.g. a clinical decision support system) has proposed an action to be requested</li>
    <li>draft: The request is in preliminary form, prior to being requested</li>
    <li>requested: The request has been