4.0.0 org.hibernate hibernate-validator jar Hibernate Validator 3.0.0.GA http://validator.hibernate.org GNU LESSER GENERAL PUBLIC LICENSE http://www.gnu.org/licenses/lgpl.txt repo Following the DRY (Don't Repeat Yourself) principle, Hibernate Validator let's you express your domain constraints once (and only once) and ensure their compliance at various level of your system automatically. http://anonhibernate.labs.jboss.com/trunk/HibernateExt/validator org.hibernate hibernate 3.2.4.sp1