{
    "type": "object",
    "properties" : {
        "sha": { "type": "string" },
        "parents": {
            "type": "array",
            "properties": {
                "sha": { "type": "string" }
            },
            "additionalProperties": false
        },
        "author": {
            "type": "object",
            "required": ["login", "email"],
            "properties" : {
                "login": { "type": ["string", "null"] },
                "email": { "type": "string" }
            },
            "additionalProperties": false
        },
        "committer": {
            "type": "object",
            "required": ["login", "email"],
            "properties" : {
                "login": { "type": ["string", "null"] },
                "email": { "type": "string" }
            },
            "additionalProperties": false
        },
        "commit": {
            "type": "object",
            "properties": {
                "message": { "type": "string" },
                "author": {
                    "type": "object",
                    "required": ["name", "email", "date", "type"],
                    "properties" : {
                        "name": { "type": "string" },
                        "email": { "type": "string" },
                        "date": { "type": "string", "format": "date-time" },
                        "type": { "type": "string" }
                    },
                    "additionalProperties": false
                },
                "committer": {
                    "type": "object",
                    "required": ["name", "email", "date", "type"],
                    "properties" : {
                        "name": { "type": "string" },
                        "email": { "type": "string" },
                        "date": { "type": "string", "format": "date-time" },
                        "type": { "type": "string" }
                    },
                    "additionalProperties": false
                },
                "additionalProperties": false
            }
        },
        "additionalProperties": false
    }
}