If you have imported an identity dataset, you will need to select and publish an output column in order to normalise your dataset and make it available to reference in identity queries.
You will use an output column to translate the results of an identity query back to a list of specific individuals. For example, the output column might contain a customer number or an email address.
Because output columns are only used in identity queries, they are only available when you import a dataset to an Identity Bunkers. In an Insight Bunker, you won't see the option to mark a column as an output column.
You can use your Bunker's web UI to mark a column as an output column.
To do so, after you've imported a dataset and have reached the Normalisation phase, simply click on the settings icon next to the column, locate Output Data and use the toggle to turn on Published.
After you click Normalise, this output column will be available to reference in identity queries. There is no limit to the number of output columns you can publish.