How to interact with this kind of datatype

Question

I have a datatype which is defined as:

data DType = DT List Int

Since it's neither a tuple, a list, or anything else which looks like I'm used to in other languages, I'm a bit confused as to how I should interact with it. I'd very much appreciate a simple example.

Answer 1

Thanks to Willem above:

Through pattern matching, so f (DT mylist myint) = ... with ... an expression with mylist and myint