This code system http://hl7.org/fhir/CodeSystem/medicationrequest-intent defines the following codes:

Code	Display	Definition
proposal	Proposal	The request is a suggestion made by someone/something that doesn't have an intention to ensure it occurs and without providing an authorization to act
plan	Plan	The request represents an intention to ensure something occurs without providing an authorization for others to act.
order	Order	The request represents a request/demand and authorization for action
original-order	Original Order	The request represents the original authorization for the medication request.
reflex-order	Reflex Order	The request represents an automatically generated supplemental authorization for action based on a parent authorization together with initial results of the action taken against that parent authorization..
filler-order	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.
instance-order	Instance Order	The request represents an instance for the particular order, for example a medication administration record.
option	Option	The request represents a component or option for a RequestGroup that establishes timing, conditionality and/or other constraints among a set of requests.