{
    "$schema": "http://json-schema.org/draft-04/schema#",
    "type": "object",
    "properties": {
        "id": {
            "type": "string",
            "description": "The uuid of the contribution"
        },
        "title": {
            "type": [
                "string",
                "null"
            ],
            "description": "The contribution's title"
        },
        "text": {
            "type": "string",
            "description": "The contribution's text"
        },
        "meta": {
            "type": "object",
            "properties": {
                "createdAt": {
                    "type": [
                        "string"
                    ],
                    "description": "The contribution's creation date"
                },
                "creator": {
                    "type": [
                        "object",
                        "null"
                    ],
                    "description": "The contribution's author"
                }
            }
        }
    },
    "claroline": {
        "ids": [
            "id"
        ]
    }
}