The common_schema project is currently hosted by Google Code. Downloads are available at the Google Code common_schema project page
The common_schema distribution is a plain text SQL source file.
The common_schema distribution file supports MySQL 5.1, 5.5 and 5.6, Oracle distribution, Percona Server and MariaDB.
common_schema includes its own documentation (see help()). However, it is also possible to download the documentation as a bundled HTML archive.