.-,----------------------.      
          |             .-,---.    |      
          V             V     |    |      
>>-BY--(----(schar,op,(---arg-+-))-+--)------------------------><

BY specifies that the data sets selected up to this point, by the processing of the INCLUDE and EXCLUDE keywords, are to be further filtered. To select the data set, all BY criteria must be met. See Filtering by data set characteristics for a full discussion of schar, op, and arg. See the separate discussions of the INCLUDE and EXCLUDE keywords for information on how these keywords are specified.

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