Is a fractional part of ".0" allowed for integers?

[mkauf]

Please clarify: Are values like 1.0 valid for the integer data type?

JSON schema allows values like 1.0 for integers. But the OpenAPI specification contains this sentence:

Note that integer as a type is also supported and is defined as a JSON number without a fraction or exponent part.

"without a fraction or exponent part" - does that mean that the number is not allowed to have a fraction part at all, e.g. 1 is valid but 1.0 is invalid? Or does it mean that a fraction of 0 is allowed, so 1 is valid and 1.0 is also valid?

Are the rules the same for JSON parameters and for query parameters?

For example, consider this OpenAPI specification:

{
    "openapi": "3.0.0",
    "info": {
        "title": "Integers",
        "version": "1.0"
    },
    "paths": {
        "/path1": {
            "post": {
                "requestBody": {
                    "content": {
                        "application/json": {
                            "schema": {
                                "type": "object",
                                "properties": {
                                    "value": {
                                        "type": "integer"
                                    }
                                }
                            }
                        }
                    }
                },
                "responses": {
                    "default": {
                        "description": "test"
                    }
                }
            }
        },
        "/path2": {
            "get": {
                "parameters": [
                    {
                        "in": "query",
                        "name": "a",
                        "schema": {
                            "type": "integer"
                        }
                    }
                ],
                "responses": {
                    "default": {
                        "description": "test"
                    }
                }
            }
        }
    }
}

Are these requests valid?

• Request 1:

curl -H "Content-Type: application/json" --data '{ "value": 1.0 }' 'http://localhost/path1'

• Request 2:

curl 'http://localhost/path2?a=1.0'