Replaced "inbuilt" with more common "built-in".

For an introduction, see :ref:`models and database queries documentation

<field-lookups-intro>`.

Django's inbuilt lookups are listed below. It is also possible to write

Django's built-in lookups are listed below. It is also possible to write

:doc:`custom lookups </howto/custom-lookups>` for model fields.

As a convenience when no lookup type is provided (like in

~~~~~~~~~~~~~~

It is now possible to write custom lookups and transforms for the ORM.

Custom lookups work just like Django's inbuilt lookups (e.g. ``lte``,

Custom lookups work just like Django's built-in lookups (e.g. ``lte``,

``icontains``) while transforms are a new concept.

The :class:`django.db.models.Lookup` class provides a way to add lookup