{
    "$schema": "http://json-schema.org/draft-04/schema#",
    "allOf": [
        {
            "$schema": "http://json-schema.org/draft-04/schema#",
            "description": "Base protocol message structure",
            "properties": {
                "messageType": {
                    "description": "Protocol message type",
                    "enum": [
                        0,
                        1,
                        2,
                        3,
                        4,
                        5
                    ],
                    "type": "integer"
                }
            },
            "required": [
                "messageType"
            ],
            "title": "Base protocol message",
            "type": "object"
        },
        {
            "properties": {
                "messageType": {
                    "description": "Protocol message type",
                    "enum": [
                        3
                    ],
                    "type": "integer"
                },
                "subscriptions": {
                    "description": "Array of OIDs desired for subscription",
                    "items": {
                        "type": "integer"
                    },
                    "type": "array"
                }
            },
            "required": [
                "subscriptions",
                "messageType"
            ],
            "type": "object"
        }
    ],
    "description": "Subscription protocol message structure",
    "title": "Subscription protocol message",
    "type": "object"
}