module test3 {
    yang-version 1;
    namespace "urn:simple.container.demo";
    prefix "t1";

    import test0 {
        prefix "data";
    }
    
    augment "/data:unknown" {
        when "if:ifType='ds0'";
        leaf interface-id {
            type leafref {
                path "/if:interfaces/if:interface/if:name";
            }
        }
    }

}