Format
------

It sets format of request/response. Currently it is supported `JSON <http://en.wikipedia.org/wiki/JSON>`_ but for future other types will be acceptable `XML <http://en.wikipedia.org/wiki/XML>`_ or `JSONP <http://en.wikipedia.org/wiki/JSONP>`_.


+------------------+-------+---------+
| parameter name   | value | default |
+==================+=======+=========+
|format            | json  | json    | 
+------------------+-------+---------+


