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When designing an application that will communicate with a remote computer, a data format and exchange protocol must be selected. There are a variety of open, standardized options, and the ideal choice depends on the applications requirements and pre-existing functionality. For example, SOAP-based web services format the data in an XML payload wrapped within a SOAP envelope.While XML works well for many application scenarios, it has some drawbacks that make it less than ideal for others. One such space where XML is often less than ideal is with Ajax-style web applications. While most browsers can construct, send, and parse XML, JavaScript Object Notation (or JSON) provides a standardized data exchange format that is better-suited for Ajax-style web applications.When the client is created with JavaScript in a browser it's much easier to exchange data with something called JSON. JSON is an acronym for JavaScript Object Notation. It is a sting-like notation that makes it easy to declare complex structures like arrays and object.JSON is a data exchange format that was created from a subset of the literal object notation in JavaScript.The charm of JSON is in its simplicity. A message formatted according to the JSON standard is composed of a single top-level object or array. The array elements and object values can be objects, arrays, strings, numbers, Boolean values (true and false), or null.

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