The CLOSE macro is used to end processing of a data set and release it from a DCB. The volume positioning (tapes only) that is to result from closing the data set can also be specified. See Positioning Volumes for the definition of volume positioning. Volume positioning options are the same as those that can be specified for end-of-volume conditions in the OPEN macro or the DD statement. An additional volume positioning option, REWIND, is available and can be specified by the CLOSE macro for magnetic tape volumes. REWIND positions the tape at the load point regardless of the direction of processing.