module types2 {
	yang-version 1;
    namespace "urn:simple.types.data.demo";
    prefix "t2";
    
    import types1 {
         prefix "t1";
     }

    organization "Cisco";

    contact "WILL-BE-DEFINED-LATER";

    description "This is types-data test description";

    revision "2013-02-27" {
        reference " WILL BE DEFINED LATER";
    }
    
    
     augment "/t1:interfaces/t1:ifEntry" {
         when "t1:ifType='ds0'";
         leaf ds0ChannelNumber {
             type string;
         }
     }
     
     typedef my-leaf-ref {
		type leafref {
			path "/t1:topology/t1:name";
		}
		description "This type is used for leafs that reference network node instance.";
	}
     
}