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

    leaf leaf1 {
       type union {   
          type string; 
          type int32;
          type uint16;  
          type uint32;
          type int64; 
      }
   }

}