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What is a tuple?

What is a tuple? Here are some definitions.

Noun
  1. (set theory) A finite sequence of terms.
  2. (computing) A single row in a relational database.
  3. (computing) A set of comma-separated values passed to a program or operating system as a parameter to a function call.
  4. (computing) In some programming languages, a data type that is similar but distinct from the list data type, whose instances are characterized by having a rather fixed arity, and the elements of which instances can differ from each other by data type. (Note: this definition may overlap with the previous one.)
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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.

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