ref: 600bbfe4aaa9ad0f73d8d73eef1b7670e5f7d3a3
dir: /man/6/json/
.TH JSON 6 .SH NAME json \- javascript object notation .SH DESCRIPTION .I JSON is a textual data transport encoding for a small collection of basic and structured values: .BR null , booleans, numbers, strings, arrays, and objects (property/value list). It is a subset of JavaScript (ECMAScript). .IR Json (2) describes a Limbo module that can read and write streams of JSON-encoded data. .PP The encoding syntax and its interpretation is defined by Internet RFC4627, but is briefly summarised here: .IP .EX .ft R .ta \w'\f2simple-xxx\f1'u +\w'\ ::=\ 'u \f2text\fP ::= \f2array\fP | \f2object\fP \f2value\fP ::= \f5null\fP | \f5true\fP | \f5false\fP | \f2number\fP | \f2string\fP | \f2array\fP | \f2object\fP \f2object\fP ::= \f5'{'\fP [\f2pair\fP (\f5','\fP \f2pair\fP)*] \f5'}'\fP \f2pair\fP ::= \f2string\fP \f5':'\fP \f2value\fP \f2array\fP ::= \f5'['\fP [\f2value\fP (\f5','\fP \f2value\fP)*] \f5']'\fP \f2number\fP ::= \f2int\fP \f2frac\fP? \f2exp\fP? \f2int\fP ::= \f5'-'\fP? \f5[0-9]\fP | \f5[1-9][0-9]\fP+ \f2frac\fP ::= \f5'.'\fP \f5[0-9]\fP+ \f2exp\fP ::= \f5[eE][-+]\fP? \f5[0-9]\fP+ \f2string\fP ::= \f5'"'\fP \f2char\fP* \f5'"'\fP \f2char\fP ::= \f5[^\ex00-\ex1F"\e\e]\fP | \f5'\e"'\fP | \f5'\e/'\fP | \f5'\eb'\fP | \f5'\ef'\fP | \f5'\en'\fP | \f5'\er'\fP | \f5'\et'\fP | \f5'\eu'\fP \f2hex\fP \f2hex\fP \f2hex\fP \f2hex\fP \f2hex\fP ::= \f5[0-9a-fA-F]\fP .EE .PD .DT .PP A sequence of blank, tab, newline or carriage-return characters (`white space') can appear before or after opening and closing brackets and braces, colons and commas, and is ignored. The .B null represents a null value of any type. The .I strings in the .I pairs of an .I object are intended to represent member names, and should be unique within that object. Note that array and object denotations can be empty. Also note that the RFC wants applications to exchange a .I text (ie, object or array) not an arbitrary .IR value . .SH SEE ALSO .IR json (2), .IR sexprs (6), .IR ubfa (6) .br .br D Crockford, ``The application/json Media Type for JavaScript Object Notation (JSON)'', .IR RFC4627 . .br .B "http://www.json.org/"