.. currentmodule:: astropy.io.fits

Header Data Units
-----------------

The :class:`ImageHDU` and :class:`CompImageHDU` classes are discussed in the
section on :ref:`Images`.

The :class:`TableHDU` and :class:`BinTableHDU` classes are discussed in the
section on :ref:`Tables`.

:class:`PrimaryHDU`
^^^^^^^^^^^^^^^^^^^
.. autoclass:: PrimaryHDU
   :members:
   :inherited-members:
   :show-inheritance:

:class:`GroupsHDU`
^^^^^^^^^^^^^^^^^^
.. autoclass:: GroupsHDU
   :members:
   :inherited-members:
   :show-inheritance:

:class:`GroupData`
^^^^^^^^^^^^^^^^^^
.. autoclass:: GroupData
   :members:
   :show-inheritance:

:class:`Group`
^^^^^^^^^^^^^^
.. autoclass:: GroupData
   :members:
   :show-inheritance:

:class:`StreamingHDU`
^^^^^^^^^^^^^^^^^^^^^
.. autoclass:: StreamingHDU
   :members:
   :inherited-members:
   :show-inheritance: