module test {  
    namespace "xpath:intra:single";  
    prefix test ;  
      
    organization "";  
    contact "";  
       
    description   
        "Defines basic service types for L3VPN service.";  
       
    revision "2015-12-16" {  
        reference "";  
    }  

    grouping group1 {
        container cont1 {
           leaf leaf1 {
             type int32;
           }
        }
    }

    container cont2 {
         uses group1;
    }

    augment /cont2/cont1 {
       leaf a {
          type int32;
       }
    }
}