{
    "$schema": "http://json-schema.org/draft-04/schema#",
    "title": "GravityItem",
    "type": "object",
    "additionalProperties": false,
    "description": "GravityItem",
    "properties": {
        "timestamp": {
            "type": "integer",
            "description": "UTC timestamp in milliseconds"
        },
        "x": {
            "type": "number",
            "description": "Measures the force of gravity that is applied to a device on the X axis"
        },
        "y": {
            "type": "number",
            "description": "Measures the force of gravity that is applied to a device on the Y axis"
        },
        "z": {
            "type": "number",
            "description": "Measures the force of gravity that is applied to a device on the Z axis"
        }
    },
    "required": [
        "timestamp",
        "x",
        "y",
        "z"
    ]
}