:Define:
Define ::= :Define: command_name [ Parameters
]
{ Global } Action { Action }
:End_Define:
Parameters ::= “(“ parameter_name { “,” parameter_name } “)”
:Define: CheckFile (Sname,Fname)
:If: Present {%’Sname’}%’Fname’
:Log: File is present
:else:
:Stop:
:End_if:
:End_Define: