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The history file name specifies that you want to build an output file with the report. There are two kinds of history files:
The first is the detail-level history file. It is an archive or database of all job accounting information (not just the information output on the report being created.) The detail-level history file is created either at the job or job step level and serves much the same purpose as the raw data, except that a detail-level history file is already formatted and merged with data collected by other systems, and all calculations are already performed. A lot of time and resources are saved when the detail-level history file rather than the raw data is used as input in subsequent executions. Any EXTDATA record created will be copied to a detail-level history file.
The second type of history file is the summary-level history file which creates an output file of summary line information. It is useful for creating subsequent periodic or year-to-date reports with little effort. The summary-level history file can be created at any sort level from 1 to 5. Note that a level 3 summary file, for example, also contains information which may be summarized mathematically for sort levels 1 and 2. EXTDATA will not be copied to summary-level history files.
The history-level flag defines the kind of history file to be created and at which level. A level 1-5 flag refers to the corresponding sort control level for a summary-level history file. A level-6 or -7 flag indicates that detail level history data is to be created at the job (6) or the job step (7) level.
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