Description

   The DELETE HISTORY command deletes all or part of the library
   history. By default, CMS writes the deleted history records to
   a file named HISTORY.DMP in your current default directory. CMS
   cannot access this file as a history file.

   The DELETE HISTORY command does not delete the library creation
   history record.

   Whenever you delete some of the library history, CMS records two
   transactions. As with other commands that modify the contents of
   the library, CMS records the deletion transaction. In addition,
   CMS logs a REMARK transaction at the point that corresponds to
   the /BEFORE value. If you do not specify the /BEFORE qualifier,
   the default is /BEFORE=current-time. The REMARK transaction
   record includes the following remark: "PREVIOUS HISTORY DELETED".
   Both the REMARK and the DELETE HISTORY transactions are unusual
   transactions. When you use the SHOW HISTORY command, CMS
   identifies unusual transactions by displaying an asterisk (*)
   in the first column of the transaction record.