docs: def Citation(ivorn, cite_type):
      """
      Deprecated alias of :func:`.EventIvorn`
      """
      import warnings
      warnings.warn(
          """
          `Citation` class has been renamed `EventIvorn` to reflect naming
          conventions in the VOEvent standard.
          As such this class name is a deprecated alias and may be removed in a
          future release.
          """,
          FutureWarning)
      return EventIvorn(ivorn, cite_type)