Version 3.0.1 of Hibernate, an open source (LGPL) object relational mapping system for Java, has been released. "Hibernate lets you develop persistent classes following common Java idiom - including association, inheritance, polymorphism, composition and the Java collections framework. The Hibernate Query Language, designed as a "minimal" object-oriented extension to SQL, provides an elegant bridge between the object and relational worlds. Hibernate also allows you to express queries using native SQL or Java-based Criteria and Example queries." 3.0.1 is a bug fix release.