JSON (JavaScript Object Notation)


JSON stands for JavaScript Object Notation.

A JSON will be seen as a JavaScript object in Javascript. As specified by RFC 4627, JSON is a lightweight data interchange format based on a subset of JavaScript syntax (ECMA-262 3rd edition).

It is a simple text format that can be used for representing nested structures of data (lists of lists of dictionaries, …).

JSON (Javascript Object Notation) has an obvious:

  • advantage over XML in that the response is lightweight. Parsing such a result is trivial in JavaScript as the format is already a valid Javascript object.
  • disavantage over tabular formats in that the space is less efficient. Example: Table - Csv Data Structure

YAML want to be an official subset of JSON. Every JSON file is also a valid YAML file.



  • rfc4627 - The application/json Media Type for JavaScript Object Notation (JSON)
  • rfc7493 - The I-JSON Message Format - I-JSON (short for “Internet JSON”) is a restricted profile of JSON designed to maximize interoperability and increase confidence that software can process it successfully with predictable results.


Json-schema is a notation to define the structure/schema of a thing. Json-Schema

Format Specification from third application



API Building

http://jsonapi.org/ - A specification for building API in Json

Json API


json does not support comment. A jsonc format has then make its apparition for config files.

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