retrieveMDLActionPlanCommand =  OMBRETRIEVE ( MDL_ACTION_PLAN ) 
          "QUOTED_STRING" ( "getActionsClause" | "retrieveActionClause" )
     getActionsClause =  GET ACTIONS
     retrieveActionClause =  ACTION "QUOTED_STRING" GET "getReferenceClause"
     getReferenceClause =  ( REF | REFERENCE )