{
    "$schema": "http://json-schema.org/draft-04/schema#",
    "type": "object",
    "properties": {
        "headline": {
            "type": "object",
            "required": [
                "htmlText"
            ],
            "properties": {
                "htmlText": {
                    "type": "string",
                    "description": "The HTML headline content."
                },
                "level": {
                    "type": "integer",
                    "description": "The hierarchical level of the headline (1 to 6).",
                    "minimum": 1,
                    "maximum": 6,
                    "default": 1
                }
            }
        },
        "intro": {
            "type": "object",
            "properties": {
                "htmlText": {
                    "type": "string",
                    "description": "Additional introductory HTML text to be shown below the headline."
                }
            }
        }
    }
}