A publication/history system for SQLAlchemy.
Clio is a library based on SQLAlchemy that can be used to add a publication workflow and archiving system to a database.
The documentation is available at http://packages.python.org/clio/
Note that currently MySQL is a requirement (for running the tests, and for the sequence support). This requirement is not a core requirement of Clio however, and the main Clio codebase does not depend on it, so it is expected to go away.