{

"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" }
}

}