The properties map each key to each associated tuple. |
A link is a tuple of object references that is an instance of an association or an association role. |
An attribute is a tuple of a key and a value. |
Justification: The point is to define several values simultaneously, not to construct a tuple. |
Both Python and Haskell have a tuple data type as well as a list data type. |
As ABC, used evolved types: tuple, list, dictionary. |