{
    "$schema": "http://json-schema.org/draft-04/schema#",
    "additionalProperties": false,
    "description": "Describes a sender",
    "properties": {
        "activation": {
            "$schema": "http://json-schema.org/draft-04/schema#",
            "additionalProperties": false,
            "description": "Parameters concerned with activation of the transport parameters",
            "properties": {
                "mode": {
                    "anyOf": [
                        {
                            "enum": [
                                "activate_immediate",
                                "activate_scheduled_absolute",
                                "activate_scheduled_relative"
                            ],
                            "type": "string"
                        },
                        {
                            "type": "null"
                        }
                    ],
                    "description": "Mode of activation: immediate (on message receipt), scheduled_absolute (when internal clock >= requested_time), scheduled_relative (when internal clock >= time of message receipt + requested_time), or null (no activation scheduled)"
                },
                "requested_time": {
                    "anyOf": [
                        {
                            "pattern": "^[0-9]+:[0-9]+$",
                            "type": "string"
                        },
                        {
                            "type": "null"
                        }
                    ],
                    "description": "String formatted TAI timestamp (<seconds>:<nanoseconds>) indicating time (absolute or relative) for activation. Should be null or not present if 'mode' is null or activate_immediate."
                }
            },
            "required": [
                "mode"
            ],
            "title": "Activation resource",
            "type": "object"
        },
        "master_enable": {
            "description": "Master on/off control for sender",
            "type": "boolean"
        },
        "receiver_id": {
            "description": "ID of the target Receiver of this Sender. This will be null if the sender is operating in multicast mode, or has not been assigned a receiver in unicast mode, or is sending to a non-NMOS receiver in unicast mode.",
            "pattern": "^[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$",
            "type": [
                "string",
                "null"
            ]
        },
        "transport_params": {
            "$schema": "http://json-schema.org/draft-04/schema#",
            "description": "Transport-specific parameters. If this parameter is included in a client request it must include the same number of array elements (or 'legs') as specified in the constraints. If no changes are required to a specific leg it must be included as an empty object ({}).",
            "items": {
                "description": "Transport-specific parameters for a transport",
                "patternProperties": {
                    "^[a-zA-Z0-9_]+$": {
                        "type": [
                            "string",
                            "boolean",
                            "null",
                            "number"
                        ]
                    }
                },
                "type": "object"
            },
            "title": "Sender Transport Parameters",
            "type": "array"
        }
    },
    "title": "Sender resource",
    "type": "object"
}