MATHEMATICA IMPORT/EXPORT FORMAT

JSON (.json)

MIME type:

.
Data interchange format.
Commonly used in web service implementations.
Contains collections of unordered name-value pairs or ordered values.
JSON is an acronym derived from JavaScript Object Notation.
Based on a subset of the JavaScript programming language.
Plain text format.
Developed in 2001.
Published as RFC 4627.

Import and Export support the JSON file format.

Import and Export Import and Export

Import["file.json"] gives a rule-based representation of a JSON file.
Export["file.json", expr] exports a list of rules to JSON.
Import["file.json", "elem"] imports the specified element from a JSON file.
Import["file.json", {"elem", "sub", ...}] imports a subelement.
Import["file.json", {{"elem₁", "elem₂", ...}}] imports multiple elements.
The import format can be specified with Import["file", "JSON"] or Import["file", {"JSON", elem, ...}].
Export["file.json", expr, "elem"] creates a JSON file by treating expr as specifying element elem.
Export["file.json", expr, opt₁->val₁, ...] exports expr with the specified option elements taken to have the specified values.
Export["file.json", {"elem₁"->expr₁, "elem₂"->expr₂, ...}, "Rules"] uses rules to specify the elements to be exported.
See the main function pages for full general information on Import and Export.
ImportString and ExportString support the JSON data format.

Elements Elements

General Import elements:

	"Elements"	list of elements and options available in this file
	"Rules"	full list of rules for each element and option
	"Options"	list of rules for options, properties, and settings

Data representation element:
"Data" contents of a JSON file as nested rules
Import by default uses the element.
When importing from JSON, lists are returned in standard Mathematica sorting order.