< draft-crockford-jsonorg-json-02.txt		draft-crockford-jsonorg-json-03.txt >
	JavaScript Object Notation D. Crockford		JavaScript Object Notation (JSON) D. Crockford
	Internet Draft JSON.org		Internet Draft JSON.org
	draft-crockford-jsonorg-json-02.txt February, 2006		draft-crockford-jsonorg-json-03.txt February, 2006
	Intended status: Informational		Intended status: Informational
	Expires: June 10, 2006		Expires: June 10, 2006
	JavaScript Object Notation		JavaScript Object Notation (JSON)
	Status of this Memo		Status of this Memo
	This document may not be modified, and derivative works of it		This document may not be modified, and derivative works of it
	may not be created, except to publish it as an RFC and to		may not be created, except to publish it as an RFC and to
	translate it into languages other than English.		translate it into languages other than English.
	By submitting this Internet-Draft, each author represents that any		By submitting this Internet-Draft, each author represents that any
	applicable patent or other IPR claims of which he or she is aware		applicable patent or other IPR claims of which he or she is aware
	have been or will be disclosed, and any of which he or she becomes		have been or will be disclosed, and any of which he or she becomes
	skipping to change at line 44 ¶		skipping to change at line 44 ¶
	http://www.ietf.org/shadow.html.		http://www.ietf.org/shadow.html.
	This Internet Draft will expire on June 10, 2006.		This Internet Draft will expire on June 10, 2006.
	Copyright Notice		Copyright Notice
	Copyright (C) The Internet Society (2006).		Copyright (C) The Internet Society (2006).
	Abstract		Abstract
	JSON (JavaScript Object Notation) is a light-weight, text-based,		JavaScript Object Notation (JSON) is a light-weight, text-based,
	language-independent, data interchange format. It was derived from		language-independent, data interchange format. It was derived from
	the ECMAScript Programming Language Standard. JSON defines a small		the ECMAScript Programming Language Standard. JSON defines a small
	set of formatting rules for the portable representation of structured		set of formatting rules for the portable representation of structured
	data.		data.
	Conventions used in this document		Conventions used in this document
	The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",		The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
	"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this		"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
	document are to be interpreted as described in [RFC-2119].		document are to be interpreted as described in [RFC-2119].
	The grammatical rules in this document are to be interpreted as		The grammatical rules in this document are to be interpreted as
	described in [RFC-4234].		described in [RFC-4234].
	1. Introduction		1. Introduction
	JSON, or JavaScript Object Notation, is a text format for the		JavaScript Object Notation (JSON) is a text format for the
	serialization of structured data. It is derived from the object		serialization of structured data. It is derived from the object
	literals of JavaScript, as defined in the ECMAScript		literals of JavaScript, as defined in the ECMAScript
	Programming Language Standard [ECMA].		Programming Language Standard, Third Edition [ECMA].
	JSON can represent four primitive types (strings, numbers, booleans,		JSON can represent four primitive types (strings, numbers, booleans,
	and null) and two structured types (objects and arrays).		and null) and two structured types (objects and arrays).
	A string is a sequence of zero or more Unicode characters.		A string is a sequence of zero or more Unicode characters [UNICODE].
	An object is an unordered collection of zero or more name/value		An object is an unordered collection of zero or more name/value
	pairs, where a name is a string, and a value is a string, number,		pairs, where a name is a string, and a value is a string, number,
	boolean, null, object, or array.		boolean, null, object, or array.
	An array is an ordered sequence of zero or more values.		An array is an ordered sequence of zero or more values.
	The terms "object" and "array" come from the conventions of		The terms "object" and "array" come from the conventions of
	JavaScript.		JavaScript.
	skipping to change at line 279 ¶		skipping to change at line 279 ¶
	An implementation may set limits on the length and character contents		An implementation may set limits on the length and character contents
	of strings.		of strings.
	5. Generators		5. Generators
	A JSON generator produces JSON text. The resulting text MUST		A JSON generator produces JSON text. The resulting text MUST
	strictly conform to the JSON grammar.		strictly conform to the JSON grammar.
	6. IANA Considerations		6. IANA Considerations
	The MIME media type for JSON text is text/json. See section 7.		The MIME media type for JSON text is text/json.
	7. Registration Template
	To: ietf-types@iana.org
	Subject: Registration of media type text/json
	Type name: text		Type name: text
	Subtype name: json		Subtype name: json
	Required parameters: n/a		Required parameters: n/a
	Optional parameters: n/a		Optional parameters: n/a
	Encoding considerations: 8bit		Encoding considerations: 8bit
	Security considerations: See section 9 below.		Security considerations:
			Generally there are security issues with scripting languages.
			JSON is a subset of JavaScript, but it is a safe subset that
			excludes assignment and invocation.
			A JSON text can be safely passed into JavaScript's eval()
			function (which compiles and executes a string) if all of the
			characters not enclosed in strings are in the set of characters
			which form JSON tokens. This can be quickly determined in
			JavaScript with two regular expressions and calls to the test and
			replace methods.
			var my_JSON_object = !(/[^,:{}\[\]0-9.\-+Eaeflnr-u \n\r\t]/.test(
			text.replace(/"(\\.|[^"\\])*"/g, ''))) &&
			eval('(' + text + ')');
	Interoperability considerations: n/a		Interoperability considerations: n/a
	Published specification: RFC-XXXX		Published specification: RFC-XXXX
	Applications that use this media type: See http://www.JSON.org.		Applications that use this media type:
			JSON has been used to exchange data between applications written
			in all of these programming languages: ActionScript, C, C#,
			ColdFusion, Common Lisp, E, Erlang, Java, JavaScript, Lua,
			Objective CAML, Perl, PHP, Python, Rebol, Ruby, and Scheme.
	Additional information:		Additional information:
	Magic number(s): n/a		Magic number(s): n/a
	File extension(s): .json		File extension(s): .json
	Macintosh file type code(s): TEXT		Macintosh file type code(s): TEXT
	Person & email address to contact for further information:		Person & email address to contact for further information:
	Douglas Crockford		Douglas Crockford
	douglas@crockford.com		douglas@crockford.com
	Intended usage: COMMON		Intended usage: COMMON
	Restrictions on usage: none		Restrictions on usage: none
	Author: Douglas Crockford		Author:
			Douglas Crockford
			douglas@crockford.com
	Change controller: Douglas Crockford		Change controller:
			Douglas Crockford
			douglas@crockford.com
	8. Security Considerations		7. Security Considerations
	Generally there are security issues with scripting languages. JSON		See Security considerations in Section 6.
	is a subset of JavaScript, but it is a safe subset that excludes
	assignment and invocation.
	A JSON text can be safely passed into JavaScript's eval() function		8. Examples
	(which compiles and executes a string) if all of the characters not
	enclosed in strings are in the set of characters which form JSON
	tokens. This can be quickly determined in JavaScript with two
	regular expressions and calls to the test and replace methods.
	var my_JSON_object = !(/[^,:{}\[\]0-9.\-+Eaeflnr-u \n\r\t]/.test(		This is a JSON object:
	text.replace(/"(\\.|[^"\\])*"/g, ''))) &&
	eval('(' + text + ')');		{
			"Image": {
			"Width": 800,
			"Height": 600,
			"Title": "View from 15th Floor",
			"Thumbnail": {
			"Url": "http://scd.mm-b1.yimg.com/image/481989943",
			"Height": 125,
			"Width": "100"
			},
			"IDs": [116, 943, 234, 38793]
			}
			}
			Its Image member is an object whose Thumbnail member is an object
			and whose IDs member is an array of numbers.
			This is a JSON array containing two objects:
			[
			{
			"precision": "zip",
			"Latitude": 37.7668,
			"Longitude": -122.3959,
			"Address": "",
			"City": "SAN FRANCISCO",
			"State": "CA",
			"Zip": "94107",
			"Country": "US"
			},
			{
			"precision": "zip",
			"Latitude": 37.371991,
			"Longitude": -122.026020,
			"Address": "",
			"City": "SUNNYVALE",
			"State": "CA",
			"Zip": "94085",
			"Country": "US"
			}
			]
	9. References		9. References
	9.1 Normative References		9.1 Normative References
	[ECMA] European Computer Manufacturers Association, "ECMAScript		[ECMA] European Computer Manufacturers Association, "ECMAScript
	Language Specification 3rd Edition", December 1999,		Language Specification 3rd Edition", December 1999,
	<http://www.ecma-international.org/publications/files/		<http://www.ecma-international.org/publications/files/
	ecma-st/ECMA-262.pdf>.		ecma-st/ECMA-262.pdf>.
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