module foo {
    namespace "foo";
    prefix foo;

    revision 2016-01-25 {
        description "test";
    }

    grouping my-grouping {
        container my-container {
            foo:e2 "e2";
        }
        foo:e1 "e1";
    }

    container root {
        uses my-grouping {
            refine e1 {
                description "new description for e1";
            }
            refine my-container/e2 {
                description "new description for e2";
            }
        }
    }

    extension e1 {
        argument name;
    }
    extension e2 {
        argument name;
    }
}