sample-process-models/misc/qa/forms/test-nested-form-1/test-nested-form-1-uischema.json

{ 
  "tasks": { 
      "items" :  {
          "title": {
            "ui:help": "Help text for title",
             "ui:placeholder": "Type your title here"
            },
          "done": {
            "ui:help": "Help text for done"
            }
      }   
  }
}