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dsn

Specifies the name of a data set whose unused space is eligible to be released. Either a fully or a partially qualified data set name can be used. See Filtering by data set names. If INCLUDE is omitted (but EXCLUDE or BY is specified) or if INCLUDE(**) is specified, all data sets are eligible to be selected for releasing.

Note: You must use FILTERDD when you have more than 255 entries in INCLUDE, EXCLUDE, or BY list keywords.

For more information, see BY and EXCLUDE.