Question

{
    "$schema": "http://json-schema.org/draft-04/schema#",
    "title": "Product set",
    "type": "array",
    "items": {
        "title": "Product",
        "type": "object",
        "properties": {
            "id": {
                "description": "The unique identifier for a product",
                "type": "number"
            },
            "name": {
                "type": "string"
            },
            "price": {
                "type": "number",
                "minimum": 0,
                "exclusiveMinimum": true
            },
            "tags": {
                "type": "array",
                "items": {
                    "type": "string"
                },
                "minItems": 1,
                "uniqueItems": true
            },
            "dimensions": {
                "type": "object",
                "properties": {
                    "length": {"type": "number"},
                    "width": {"type": "number"},
                    "height": {"type": "number"}
                },
                "required": ["length", "width", "height"]
            },
            "warehouseLocation": {
                "description": "Coordinates of the warehouse with the product",
                "$ref": "http://json-schema.org/geo"
            }
        },
        "required": ["id", "name", "price"]
    }
}

在上面的Json架构＆＃34;维度＆＃34;是＆＃34;类型＆＃34;：＆＃34;对象＆＃34; ，是类型可选的，如果＆＃34;类型＆＃34;如果我认为它是对象，则不指定。找不到与可选元素相关的规格中的任何内容。

Answer 1

http://tools.ietf.org/html/draft-zyp-json-schema-03#section-5.1

If the property is not defined or is not in this list, then any
type of value is acceptable.

type是可选的，如果省略type，则可以接受任何值。

Answer 2

我认为不是可选的。正如您在下面的元架构中所看到的，属性＆＃34; type＆＃34;没有默认值：

http://json-schema.org/schema

同样在我的JSON模式库NJsonSchema中，我将类型设置为None而不是Object。查看TypeRaw属性：

https://github.com/rsuter/NJsonSchema/blob/master/NJsonSchema/JsonSchema4.Serialization.cs

当默认值设置为Object时，JSON Schema测试套件中的更多测试失败。也许你可以在这个JSON Schema测试套件中找到一个明确的答案：

https://github.com/json-schema/JSON-Schema-Test-Suite

Json模式中的“type”是可选的

2 个答案: