module file-test1-b {
    yang-version 1;
    namespace
      "http://test1.org/ns/file/b";
    prefix t1fb;

    import file-test1-a {
        prefix t1fa;
    }

    revision "2009-11-21" {
      description
        "sample module in progress.";
    }

    identity id4 {
       base t1fa:id2;
    }

    identity id5 {
       base t1fa:id2;
    }

    identity id6 {
       base t1fa:id1;
    }

    identity id7 {
       base t1fa:id1;
    }
}