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Packed data sets z/OS ISPF User's Guide Vol I SC19-3627-00 |
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The packed data set format allows you to use direct access storage devices (DASD) more efficiently. In this format, ISPF replaces any repeating characters with a sequence showing how many times the character is repeated. Before you can properly use data stored in this format as input to processing programs, such as compilers, you must first tell ISPF to unpack and expand the data. The two requirements for using packed data sets are:
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