What's the difference between type and data type in Haskell?

I'm a little confused as to the difference between a type and a data type in Haskell.

From the literature I have encountered I got the impression they were different concepts.

Solution 1:

Type and data type refer to exactly the same concept.

The Haskell keywords type and data are different, though: data allows you to introduce a new algebraic data type, while type just makes a type synonym.

See the Haskell wiki for details.

Solution 2:

The terms are sometimes mixed, but usually a "data type" refers to a type introduced using the data keyword, which has constructors you can pattern match on. These are also called algebraic data types".

Just "type" is a more general term which also includes types created using newtype, function types and so on.