The Zones editor allows you to indicate whether rule results are unique (across zones) by a specified property or dimension value.

This uniqueness constraint does not apply to featured records even if uniqueness is enabled for dynamically generated rule results. For example, if you enabled “Color” to be the unique property for record results and you have two dynamically generated records with “Blue” as property value, then the MDEX Engine excludes the second record as a duplicate. On the other hand, if you have the same scenario but the two records are featured results not dynamically generated results, the MDEX Engine returns both records.