The FILTERDD keyword must be used if you have more than 255 entries in the INCLUDE, EXCLUDE, or BY filtering lists. The FILTERDD keyword specifies the name of the DD statement that identifies the sequential data set or member of a partitioned data set that contains the filtering criteria to be used. This is in the form of card-image records, in DFSMSdss command syntax, that contain the INCLUDE, EXCLUDE, and BY keywords.