I often use the DuplicateFilter to get a quick list of unique attribute values for a specific attribute. For this use case all other attributes that are still present after the DuplicateFilter are not needed and to see the desired result, you either have to remove the superfluous attributes with another transformer like the AttributeKeeper or hide them in the visual preview.
That’s why I suggest to add the option to remove unselected attributes to the DuplicateFilter.
Remark: I’m aware, that you can already get a similar result with the Aggregator, but if a feature geometry is present all input geometries would have to be processed allthough they are not needed for the above use case.
