@Test
public void testParseWithoutVersion() throws NoSuchAuthorityCodeException {

    final URN_Parser parser = URN_Parser.buildParser("urn:ogc:def:CRS:EPSG:4326");
    assertEquals("crs",       parser.type.name);
    assertEquals("EPSG",      parser.authority);
    assertNull  (             parser.version);
    assertEquals("4326",      parser.code);
    assertEquals("EPSG:4326", parser.getAuthorityCode());
}