The main problem is that we are still using XML to do component definition and composition. We need to better language (no, json and yaml are not the answer).

I am working on a new language concept (still at early thinking) but the alert template document would be defined as:

  alert#update_available [  //Composition is separated from definition
     btn#update,
     btn#cancel
  ]

  alert { //All alert elements are defined as alertTemplate
     type: alertTemplate
  }

  btn { //All btn elements are define as button
     type: button
  }

  alert#update_available { //Define the title and description for the alert with ID update_available
     title: Get the latest tvOS version
     description: Get the latest tvOS version
  }

  btn#update {
     text: Update Now
  }

  btn#cancel {
     text: Cancel
  }

  //We could override the settings like CSS
  (@language = "pt_br") { 
  //If variable language is pt_br override the content with Brazilian Portuguese texts
    btn#update {
       text: Atualize Agora
    }

    btn#cancel {
       text: Cancelar
    }
  }