Introducing JSON
How JavaScript Works by Douglas Crockford
E Voncri
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TiCng Vct
ECMA-404 The JSON Data
Interchange Standard.
JSON (JavaScript Object Notation) is
lightweight data-interchange format: It is easy for humans to read and
write. It is easy for machines tO parse and generate: It is based on
subset of the JavaScript Programming
json
Language Standard ECMA-262 3rd Edition
December 1999. JSON is
text format that is completely language
element
independent but uses conventions that are familiar to programmers of the C-family of languages
including C;
Ctt,C#, Java, JavaScript; Perl, Python_
and many others_
properties make JSON an ideal data-interchange
value
language:
object
array
JSON is built on two structures:
string
number
A collection of namelvalue pairs_
In various languages; this is realized as an object; record, struct;
dictionary;
true
hash table; keyed list; or associative array:
false
An ordered list of values.
In most
languages, this is realized as an array, vector;
Or sequence:
null
These are universal data structures
Virtually all modern programming languages support them in one form OT
object
another: It makes sense that
data format that is interchangeable with programming languages also be based on
WS
these structures_
members
In JSON, they take on these forms:
members
member
An object is an unordered set of name/value pairs. An object begins with { teft brace and ends with }right brace
Each
member
members
name is followed by
colon
and the namelvalue pairs are separated by
cummd
member
ws string WS
element
object
whitespace
array
WS
clomontc
LLJI
Juoe
These
Jist,