Creating routes in IONIC: Multiples abstract

Today I come with a new doubt turns out that I am in ionic and I am creating the routes. I understand that the class abstract is a boolean that allows me to inherit children, that is to say I give birth with a tab and the children would be their selection tab / home, tab / adjustments, etc ...

.state('tab', {  
    url: '/tab',  
    abstract: true,  
    templateUrl: 'templates/tabs.html'  
   })  

  .state('tab.home', {  
    url: '/home',  
    views: {  
      'tab-home': {  
        templateUrl: 'templates/tab-home.html',  
        controller: 'homeCtrl'  
    }  
  }  
  })  

Now I ask how do I have two abtracted classes?

I ask because in the first instance, when opening the app, the home view appears and I want it to inherit two more views home / login and home / registration and when I complete the registration in my app or start session, open the tab view and run normally as it was created.

Greetings.