module IdentityTest{
    yang-version 1;
    namespace http://huawei.com;
    prefix IdentityTest;

    identity ref-address-family {
        description "ref-address-family";
    }

    identity ipv4-address-family {
        base ref-address-family;
    }

    leaf tunnel {
        type identityref {
            base ref-address-family;
        }
    }
}