{
    "$schema": "http://json-schema.org/draft-04/schema#",
    "type": "object",
    "required": [
        "id",
        "category",
        "priority",
        "content"
    ],
    "properties": {
        "created": {
            "type": "string",
            "format": "date-time"
        },
        "modified": {
            "type": "string",
            "format": "date-time"
        },
        "id": {
            "type": "string"
        },
        "category": {
            "type": "string"
        },
        "priority": {
            "type": "string"
        },
        "content": {
            "type": "object",
            "minProperties": 1,
            "additionalProperties": {
                "type": "string"
            }
        }
    }
}