.. _design: Design ****** .. warning:: Much of the documentation in this section is very old: some of it dates back to the origin of the MPS in 1995. It has not been brought up to date or checked for correctness, so it is mainly of historical interest. As pieces of documentation are brought up to date, they will be moved to the :ref:`internals` section. .. toctree:: :numbered: arena bt cbs check class-interface collection config finalize fix lock object-debug protocol type version version-library