.. |Row| replace:: :class:`~astropy.table.Row`
.. |Table| replace:: :class:`~astropy.table.Table`
.. |QTable| replace:: :class:`~astropy.table.QTable`
.. |Column| replace:: :class:`~astropy.table.Column`
.. |MaskedColumn| replace:: :class:`~astropy.table.MaskedColumn`
.. |TableColumns| replace:: :class:`~astropy.table.TableColumns`
.. _OrderedDict: http://docs.python.org/library/collections.html#collections.OrderedDict