Output Data Set Prefix The Output Data Set Prefix field is used to specify a name for the output SAS data set. If you leave this field blank, the name of the input data set, with _ars appended as a suffix, is used by default. For detailed information about the files and data sets used or created by JMP Life Sciences software, see Files and Data Sets. To Specify an Output Name: Left-click in the field and type a name for the output data set.