Key-value pair

Key-value pair is a fundamental data type, which only specifies a relationship between a name or key with a value. It can be thought of as a kind of hashtable or dictionary data type, and can be used to implement S-expressions. It's plural form is: Key-value pairs, described as follows: Key-value pairs is the plural form of Key-value pair, A key-value pairs can be considered as a function, a hash table, or a dictionary.

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It is known that ordered pairs of data was used to construct matrix algebra.

Industry Examples of Nested Key-value pairs

The yaml, Yet Another Markup Language, is a typical realization of denoting key-value pairs in a highly popular language in the world of Infrastructure as code. JSON, the JavaScript Serial Object Notation, is another kind of nested key-value pairs. JSON's expressiveness is basically equivalent to yaml.

Associative Array

Associative array is a kind of table, like Table in Lua, which is stored as a set of key-value pairs.