Parameters

device-name[:][,...]

   Specifies the name of a physical device or a logical name that
   translates to the name of a physical device. The device name
   can be generic: if no controller or unit number is specified,
   any device that satisfies the specified part of the name is
   allocated. If more than one device is specified, the first
   available device is allocated.


logical-name[:]

   Specifies a string of 1 to 255 alphanumeric characters. Enclose
   the string in single quotation marks (` ')  if it contains
   blanks. Trailing colons (:)  are not used. The name becomes a
   process logical name with the device name as the equivalence
   name. The logical name remains defined until it is explicitly
   deleted or your process terminates.