Doctrine 2: Enterprise Persistence Layer for PHP

Doctrine 2 is a complete re-implementation of the Doctrine ORM under PHP 5.3. It is successor of Doctrine 1 and a major improvement over the first version both in code quality, organization and most important performance. Doctrine 2 is the first real enterprise persistence layer to ever be available for PHP and should open many doors to allow PHP to be more easily used by the enterprise world. It is heavily influenced by the JPA version 2 and the infamous Java ORM, Hibernate.