{
    "$schema": "http://json-schema.org/draft-04/schema#",
    "additionalProperties": false,
    "properties": {
        "end": {
            "_format": "date",
            "description": "Date your basis period ended",
            "title": "End date",
            "type": "string"
        },
        "start": {
            "_format": "date",
            "description": "Date your basis period began",
            "title": "Start date",
            "type": "string"
        }
    },
    "required": [
        "start",
        "end"
    ],
    "title": "Basis period",
    "type": "object"
}