Tag keys and values correspond in the same rows. Any key selected on the left column can match any value mentioned in the right column. If you want to group multiple tag keys say 'team' along with 'role' or 'component' along with 'stack' then do not multi-select these tag keys in the same column. Add separate columns for  tag keys and values rows for multiple grouping. As tag keys are case sensitive, if you have similar category of tag keys say ‘env/Environment/environment’ or ‘team/Team/Unit’ then you should multi-select them in the same column.

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