Messages can be sent to and received from ports, but these messages must obey the so-called "port protocol." Haskell is a standardized, general-purpose purely functional programming language, with non-strict semantics and strong static typing. Tuples are containers for a fixed number of Erlang data types. Ports are created with the built-in function open_port. Haskell is a standardized, general-purpose purely functional programming language, with non-strict semantics and strong static typing.
