{ "description" : "A representation of an event", "type" : "object", "properties" : { "dtstart" : { "format" : "date-time", "type" : "string", "description" : "Event starting time", "required":true }, "summary" : { "type":"string", "required":true }, "location" : { "type" : "string" }, "url" : { "type" : "string", "format" : "url" }, "dtend" : { "format" : "date-time", "type" : "string", "description" : "Event ending time" }, "duration" : { "format" : "date", "type" : "string", "description" : "Event duration" }, "rdate" : { "format" : "date-time", "type" : "string", "description" : "Recurrence date" }, "rrule" : { "type" : "string", "description" : "Recurrence rule" }, "category" : { "type" : "string" }, "description" : { "type" : "string" }, "geo" : { "$ref" : "http://json-schema.org/draft-03/geo" } } }