{
    "$schema": "http://json-schema.org/draft-04/schema#",
    "type": "object",
    "required": [
        "articles",
        "selection"
    ],
    "properties": {
        "articles": {
            "type": "object",
            "description": "Display a list of articles.",
            "required": [
                "resource"
            ],
            "properties": {
                "resource": {
                    "type": "string",
                    "format": "topic",
                    "axRole": "inlet",
                    "description": "Name of the data resource with articles."
                }
            }
        },
        "selection": {
            "type": "object",
            "description": "Select an article.",
            "required": [
                "resource"
            ],
            "properties": {
                "resource": {
                    "type": "string",
                    "format": "topic",
                    "axRole": "outlet",
                    "description": "Name of the resource for the user selection"
                }
            }
        }
    }
}