The HPBNET Procedure

The optional ID statement lists one or more variables from the input data set to be transferred to the prediction output data set. The ID statement accepts both numeric and character variables. The variables in an ID statement can also appear in any other statements.

To avoid data duplication for large data sets, by default PROC HPBNET includes only the target variable from the input data set in the prediction output data set. Therefore, you can use the ID statement to copy variables from the input data set to the prediction output data set.