{
    "additionalProperties": false,
    "properties": {
        "categories": {
            "items": {
                "type": "string"
            },
            "type": "array"
        },
        "furtherReading": {
            "additionalProperties": {
                "format": "uri",
                "type": "string"
            },
            "type": "object"
        },
        "id": {
            "pattern": "^[a-z0-9-]+$",
            "type": "string"
        },
        "keywords": {
            "items": {
                "minLength": 1,
                "type": "string"
            },
            "type": "array"
        },
        "related": {
            "items": {
                "minLength": 1,
                "type": "string"
            },
            "type": "array"
        },
        "tags": {
            "items": {
                "enum": [
                    "inaccurate",
                    "incomplete",
                    "proprietary",
                    "not-a-number"
                ],
                "type": "string"
            },
            "type": "array"
        },
        "title": {
            "type": "string"
        },
        "visible": {
            "type": "boolean"
        }
    },
    "required": [
        "id",
        "title",
        "visible"
    ],
    "title": "Article",
    "type": "object"
}