DFDL as a filter rule language?

[Roger L Costello]

Hi Folks,

Has anyone used DFDL as a filter rule language?

For an example of what I mean by "filter rule language", suppose we have a 
comma-separated value (CSV) data format where instances contain data about cars 
(make, model, year, cost, etc.) and we have this filter rule

        Release a CSV instance only if it contains data about cars
        with year greater than 2000. Otherwise, delete the instance.

It seems like DFDL/Daffodil should be able to express that filter rule. Yes? No?

/Roger