View source for Key-value pair

[[wikipedia: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-expression]]s. The ultimate [[meta-language]] [[Backus-Naur form]] is basically a collection of [[key=value pair]]s.

A collection of [[key=value pair]]s can also be considered as a lookup table or a [[dictionary]] data type, the description of [[key-value pair]]'s plural form is described as follows: {{:Key-value pairs}}. 

It is known that [[ordered pair]]s of data was used to construct [[matrix algebra]]<ref>{{:Paper/Accounting Games}}</ref>. 

==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]].


===Backus-Naur Form===
{{:Backus-Naur Form}}

===Associative Array===
[[Associative array]] is a kind of [[table]], like [[Table]] in [[Lua]], which is stored as a set of [[key-value pair]]s.


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=References=
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==Related Pages==
[[Category:Namespace Management]] [[Category:Universal Data Abstraction]] [[Category:Function]]
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