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+Transformers
+============
+
+**hircine** supports modification of scraper results by the use of
+transformers. Transformers are functions that hook into the scraping process
+and may freely modify any :ref:`scraped-data` before it is shown to the user.
+
+A transformer is specified by decorating a generator function with the
+:func:`~hircine.plugins.transformer` decorator.
+
+.. autodecorator:: hircine.plugins.transformer
+
+.. autoclass:: hircine.scraper.ScraperInfo
+
+Registering transformers
+------------------------
+
+To register transformers, place them into a module in the
+``hircine.transformer`` :ref:`entry point group <packaging:entry-points>`. For
+example, put the following in a ``pyproject.toml`` file:
+
+.. code-block:: toml
+
+   [project.entry-points.'hircine.transformer']
+   my_transformers = 'mytransformers.transformers'
+
+Example
+-------
+
+.. literalinclude:: /_examples/example_transformer.py
+   :language: python