sample-process-models/misc/qa/test-business-rule-task/fruits-schema.json

{
  "title": "Favorite Fruit",
   "type": "object",
  "properties": {
    "favoriteFruit": {
      "title": "Select your favorite fruit",
      "type": "string",
      "oneOf": [     
            {
            "const": "None",
            "title": "None from the list"
            },    
            {
            "const": "apples",
            "title": "Apples"
            },
            {
            "const": "oranges",
            "title": "Oranges"
            },
            {
            "const": "bananas",
            "title": "Bananas"
            } 
      ]
    }
  }
}