About: Name–value pair

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A name–value pair, also called an attribute–value pair, key–value pair, or field–value pair, is a fundamental data representation in computing systems and applications. Designers often desire an open-ended data structure that allows for future extension without modifying existing code or data. In such situations, all or part of the data model may be expressed as a collection of 2-tuples in the form with each element being an attribute–value pair. Depending on the particular application and the implementation chosen by programmers, attribute names may or may not be unique.

Attributes	Values
rdf:type	Thing
rdfs:label	Name–value pair (en)
rdfs:comment	A name–value pair, also called an attribute–value pair, key–value pair, or field–value pair, is a fundamental data representation in computing systems and applications. Designers often desire an open-ended data structure that allows for future extension without modifying existing code or data. In such situations, all or part of the data model may be expressed as a collection of 2-tuples in the form <<i>attribute name</i>, <i>value</i>> with each element being an attribute–value pair. Depending on the particular application and the implementation chosen by programmers, attribute names may or may not be unique. (en)
dbp:wikiPageUsesTemplate	dbt:Authority_control dbt:More_references dbt:Short_description
Subject	Data modeling
prov:wasDerivedFrom	http://en.wikipedia.org/wiki/Name–value_pair?oldid=1069645565&ns=0
Wikipage page ID	2048269 (xsd:integer)
page length (characters) of wiki page	2896 (xsd:nonNegativeInteger)
Wikipage revision ID	1069645565 (xsd:integer)
Link from a Wikipage to another Wikipage	Forward compatibility XML Application software Associative array Attribute (computing) BibTeX Tuple Data modeling Dublin Core Metadata Serialization Key–value database Communication protocol Computer Programming language Data (computing) Data model Data structure Database Email Entity–attribute–value model INI file HTML Internet Protocol Type–length–value URL Standard Generalized Markup Language JSON Nesting (computing) Query string Resource Description Framework Windows Registry
has abstract	A name–value pair, also called an attribute–value pair, key–value pair, or field–value pair, is a fundamental data representation in computing systems and applications. Designers often desire an open-ended data structure that allows for future extension without modifying existing code or data. In such situations, all or part of the data model may be expressed as a collection of 2-tuples in the form <<i>attribute name</i>, <i>value</i>> with each element being an attribute–value pair. Depending on the particular application and the implementation chosen by programmers, attribute names may or may not be unique. Some of the applications where information is represented as attribute–value pairs are: * E-mail, in RFC 2822 headers * Query strings, in URLs * Optional elements in network protocols, such as IP, where they often appear as TLV (type–length–value) triples * Bibliographic information, as in BibTeX and Dublin Core metadata * Element attributes in SGML, HTML, and XML private metadata in RDF * Some kinds of database systems – namely a key–value database * private map map data * Windows registry entries Some computer languages implement attribute–value pairs, or more frequently collections of attribute–value pairs, as standard language features. Most of these implement the general model of an associative array: an unordered list of unique attributes with associated values. As a result, they are not fully general; they cannot be used, for example, to implement electronic mail headers (which are ordered and non-unique). In some applications, an attribute–value pair has a value that contains a nested collection of attribute–value pairs. Some data privateformats such as JSON support arbitrarily deep nesting.Other data representations are restricted to one level of nesting, such as INI file's section/name/value. (en)
foaf:isPrimaryTopicOf	http://en.wikipedia.org/wiki/Name–value_pair
is Wikipage redirect of	Attribute-value Attribute-value pair Attribute-value pairs Attribute/value Attribute/value pair Attribute–value Attribute–value pair Name-value Name/value Name/value pair Name–value K-v pair K/v-pair K/v pair Key-value Key/value Key/value pair Key=value pair Key–value pair Key-value pair Key-value pairs Key Value Pair Key value Key value pair Key–value Field-value Field/value Field/value pair Field–value Field–value pair K–v pair Arbitrary key-value pair Arbitrary key-value pairs Arbitrary key value pair Attribute–value pairs Field-value pair Name-value pair
is Link from a Wikipage to another Wikipage of	NVP (disambiguation) ANNOVAR APE tag AVP Amazon DynamoDB Ampersand AppleScript Application Response Measurement Association list Associative array Attribute-value Attribute-value pair Attribute-value pairs Attribute/value Attribute/value pair Attribute (computing) Attribute–value Attribute–value pair

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