schema.json

{
    "$schema": "http://json-schema.org/draft-07/schema#",
    "additionalProperties": false,
     "definitions": {
       "FruitEnum": {
         "enum": [
           "apple",
           "orange"
         ],
         "type": "string"
       }
     },
     "properties": {
        "propBooleanFalse": {
            "type": "boolean",
            "default": false
        },
        "propBooleanTrue": {
            "type": "boolean",
            "default": true
        },
        "propEnum": {
            "$ref": "#/definitions/FruitEnum",
            "default": "apple"
        },
        "propFloat": {
            "type": "number",
            "default": 12.3
        },
        "propInteger": {
            "type": "number",
            "default": 123
        },
        "propString": {
            "type": "string",
            "default": "test"
        }
    },
    "required": [
        "propBooleanFalse",
        "propBooleanTrue",
        "propEnum",
        "propFloat",
        "propInteger",
        "propString"
    ],
    "type": "object"
}