{
    "categories": {
        "read": true,
        "update": "$role === 'admin'",
        "add": "$role === 'admin'",
        "remove": "$role === 'admin'",
        "count": true,
        "watch": true,
        "$schema": {
            "password": { "match": "^\\d{6,10}$"},
            "author_id": "$value == $userid",
            "type": {"required": true, "in": ["choice", "fill"]}, 
            "title": {"length": [4, 64], "required": true, "unique": true},
            "content": {"length": [4, 20480]},
            "total": {"number": [0, 100], "default": 0, "required": true}
        },
        "$version": 2
    }
}