{
    "$schema": "http://json-schema.org/draft-04/schema#",
    "title": "Data Retention",
    "description": "Defines the format for describing the retention policy of a data source",
    "type": "object",
    "properties": {
        "span": {
            "description": "The expected lifespan (in seconds) of a data object",
            "type": "integer",
            "minimum": 0
        }
    },
    "required": [
        "span"
    ]
}