{
    "$schema": "http://json-schema.org/draft-04/schema#",
    "$defs": {
    "field": {
        "type": "object",
        "required": ["typeClass", "multiple", "typeName"],
        "properties": {
            "value": {
                "anyOf": [
                    {
                        "type": "array"
                    },
                    {
                        "type": "string"
                    },
                    {
                        "$ref": "#/$defs/field"
                    }
                ]
            },
            "typeClass": {
                "type": "string"
            },
            "multiple": {
                "type": "boolean"
            },
            "typeName": {
                "type": "string"
            },
            "displayOnCreate": {
                "type": "boolean"
            }
        }
    }
},
"type": "object",
"properties": {
    "datasetVersion": {
        "type": "object",
        "properties": {
           "license": {
                "type": "object",
                "properties": {
                    "name": {
                        "type": "string"
                    },
                    "uri": {
                        "type": "string",
                        "format": "uri"
                   }
                },
                "required": ["name", "uri"]
            },
            "metadataBlocks": {
                "type": "object",
               "properties": {
                           "citation": {
                            "type": "object",
                            "properties": {
                                "fields": {
                                    "type": "array",
                                    "items": {
                                        "$ref": "#/$defs/field"
                                    },
                                    "minItems": 5,
                                    "allOf": [
                                        {
                                            "contains": {
                                                "properties": {
                                                    "typeName": {
                                                        "const": "title"
                                                    }
                                                }
                                            }
                                        },
                                        {
                                            "contains": {
                                                "properties": {
                                                    "typeName": {
                                                        "const": "author"
                                                    }
                                                }
                                            }
                                        },
                                        {
                                            "contains": {
                                                "properties": {
                                                    "typeName": {
                                                        "const": "datasetContact"
                                                    }
                                                }
                                            }
                                        },
                                        {
                                            "contains": {
                                                "properties": {
                                                    "typeName": {
                                                        "const": "dsDescription"
                                                    }
                                                }
                                            }
                                        },
                                        {
                                            "contains": {
                                                "properties": {
                                                    "typeName": {
                                                        "const": "subject"
                                                    }
                                                }
                                            }
                                        }
                                    ]
                                }
                            },
                            "required": ["fields"]
                        }
                     },
                    "required": ["citation"]
                }
            },
            "required": ["metadataBlocks"]
        }
    },
    "required": ["datasetVersion"]
}