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.. _declarative_toplevel:
.. currentmodule:: sqlalchemy.ext.declarative
======================
Declarative Extensions
======================
Extensions specific to the :ref:`Declarative <orm_declarative_mapping>`
mapping API.
.. versionchanged:: 1.4 The vast majority of the Declarative extension is now
integrated into the SQLAlchemy ORM and is importable from the
``sqlalchemy.orm`` namespace. See the documentation at
:ref:`orm_declarative_mapping` for new documentation.
For an overview of the change, see :ref:`change_5508`.
.. autoclass:: AbstractConcreteBase
.. autoclass:: ConcreteBase
.. autoclass:: DeferredReflection
:members:
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