Processes | Pattern Discovery | ID Variables

ID Variables
Use this field to specify one or more variables whose values can, either singly or in combination, provide a unique identifier for each row. These variables are used to generate names for the distance variables and are copied to the Output Data Set .
The maximum length of the combined Prefix + ID variables is 32 characters minus the number of rows in the data set. If the form of the input data is already a distance matrix , these ID variables are used to label the cluster Dendrogram .
To Specify One or More Input ID Variables:
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All of the variables in the input data set are displayed in the Available Variables field.
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Click to add the highlighted variable(s) to the ID Variables field, as shown below: