Refer to RFC4627 (http://tools.ietf.org/html/rfc4627)
https://www.oasis-open.org/apps/org/workgroup/odata/download.php/46986/odata-json-format-v1.0-wd01-2012-09-24-RH.doc https://www.oasis-open.org/apps/org/workgroup/odata/download.php/47010/odata-json-format-v1.0-wd01-2012-09-27-RH.doc
Accepted: https://www.oasis-open.org/apps/org/workgroup/odata/download.php/47020/latest/odata_meeting-9_on-20120927_minutes.html