The Data Append process appends the rows of one SAS data set to the end of another SAS data set to generate one rowwise concatenated SAS data set.Two SAS data sets are required for the Data Append process. One of these is specified as the base input data set while the other is specified as the append input data set .For detailed information about the files and data sets used or created by JMP Life Sciences software, see Files and Data Sets .Refer to the Append output documentation for a detailed description of the output of this process.