{
    "$schema": "http://json-schema.org/draft-04/schema#",
    "properties": {
        "target": {
            "anyOf": [
                {
                    "_format": "uri",
                    "type": "string"
                },
                {
                    "additionalItems": true,
                    "items": {
                        "anyOf": [
                            {
                                "type": "string"
                            },
                            {
                                "type": "object"
                            }
                        ]
                    },
                    "type": "array"
                },
                {
                    "type": "object"
                }
            ]
        }
    },
    "required": [
        "target"
    ],
    "title": "Verify annotation has 1 or more targets",
    "type": "object"
}