Enable hierarchical query labels within a data entry setup

It would be extremely useful if we could create query labels with dynamic filters such that the filtered values are selected from values selected in other labels within the same data entry setup. For example, if I have a data entry setup with fields for Site, Product and Unit Operation, once the user selects a specific Site, the query associated with the Product label should be automatically filtered on only those products associated with that site. Similarly, once the Product is selected, the Unit Operation label should be automatically filtered on only those unit operations associated with that product at that site. Of course, in order for this to work, there must be content located within the system that links the values from the different labels together. The benefit of this functionality is that data entry users will have a much easier time selecting the correct options, preventing data entry errors and reducing data entry time. In the absence of this functionality, we often have to configure additional data entry setups in order to make it easier for the data entry users to select the correct values without frustration at long lists of irrelevant values.