[Haskell-beginners] confusion about parameterized types.

Here is a record I defined

module PrepData where data Value = Cost Int | ID Int type Tname = String data StudentsOrActivites = Students String | Activities String data Table soa v = PopTable { tableName :: Tname , tableColumns :: [(soa, v)] } deriving (Show, Read)

I'm trying to define another record in terms of Table

data ProcessData = ProcessData { flatfile :: String , processfunc :: String ->

what I would like processfunc to be is a function that takes a String and returns a Table. The type variables are tripping me up. Could someone help me work out the syntax, and the clarifying of my intent?