{
    "$schema": "http://json-schema.org/draft-04/schema#",
    "type": "object",
    "properties": {
        "dictionary": {
            "type": "object",
            "patternProperties": {
                "^[a-zA-Z0-9]{1,10}$": {
                    "type": "string"
                }
            },
            "additionalProperties": false
        }
    },
    "additionalProperties": false
}