tilt-purpose-vocabulary.schema.json

{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "type": "object",
  "properties": {
    "purpose": {
      "$ref": "#/definitions/purpose"
    }
  },
  "required": [
    "purpose"
  ],
  "definitions": {
    "purpose": {
      "type": "string",
      "allOf": [
        {
          "anyOf": [
            {
              "const": "Apple"
            },
            {
              "enum": [
                "Cat",
                "Dog"
              ]
            }
          ]
        },
        {
          "not": {
            "enum": [
              "Earth",
              "Water",
              "Air",
              "Fire"
            ]
          }
        }
      ]
    }
  }
}