Nombrevalor

Nombrevalor, or name-value pair, is a data representation in which information is encoded as pairs consisting of a name (a key or identifier) and a value. This simple structure enables a direct association between identifiers and their data and is foundational in data interchange and configuration.

Name-value pairs appear in many formats and technologies. In programming, they are implemented as maps, dictionaries, or objects. In data interchange and configuration, they are used in query strings, form data, HTTP headers, environment variables, and configuration files, often with the possibility of multiple values per name in some formats.

Common examples include a URL query string such as ?page=3&size=10, a form field like username=alice, and a JSON object such as { "page": 3, "size": 10 }. XML attributes also follow a name-value pattern, where each attribute has a named value.

The approach offers advantages such as simplicity, extensibility, and language-neutral parsing, making it widely applicable across platforms and protocols. It also entails considerations around data typing, encoding, and escaping. Proper handling of special characters, consistent key naming, and clear value representations help avoid ambiguity and security issues.

See also: name-value pair, key-value store, configuration file, query string, HTTP header.