What is JSON?
JSON is a
very lightweight data format based on a subset of the JavaScript syntax,
namely array and object literals. JSON allows communicating with server
in a standard way. JSON is used as communication notation instead of
XML.
JSON objects are typed while XML data is typeless
1.JSON
types: string, number, array, boolean,
2.XML data are all string
JSON
stands for Javascript Object Notation which is a data structuring
format that is extremely clean and lightweight. Even though JSON is
native to javascript (as in, it can be turned into an object directly by
javascript), it is quite easy to handle with other languages, making it
an ideal replacement of XML when javascript is involved with the
exchange of data (i.e. ajax).
var fruitColors =
{
"apple":"green",
"banana":"yellow",
"orange":"orange"
};
alert(fruitColors .apple); //outputs "green"
alert(fruitColors
.orange); //outputs "orange"
The above code creates an
javascript object bike with two properties apple and orange
JSON Structures
• A collection of
name/value pairs
In various languages, this is realized as an object,
record,struct, dictionary, hash table, keyed list, or associative array
•
An ordered list of values
In most languages, this is realized as an
array, vector, list, or sequence
JSON
Object Notation
• A JSON object is an unordered set of
name/value pairs
• A JSON object begins with { (left brace) and ends
with } (right brace)
• Each name is followed by : (colon) and the
name/value pairs are separated by , (comma)
For more info please
visit:
http://msdn.microsoft.com/en-us/library/bb299886.aspx
http://www.json.org/
http://en.wikipedia.org/wiki/JSON
