Processes | Expression Parameters | Variables by Which to Merge Annotation Data 2

Variables by Which to Merge Annotation Data 2
Use this field to specify variables that are to be used to merge the results of this process with the Secondary Annotation SAS Data Set specified on the Anno 2 tab. The values of these variables create a matching key used to perform the join. They are often the same as one or more of the By Variables specified previously.
If left blank , these are assumed to be the same as the Secondary Annotation Merge Variables .
To Specify One or More Variables by Which to Merge Annotation 2 Data:
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All of the variables in the specified input data set are displayed in the Available Variables field.
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Click to add the highlighted variable(s) to the By Which to Merge Annotation Data 2 field, as shown below: