https://docs.jboss.org/hibernate/orm/4.2/manual/en-US/html_single/#persis... The link above observes that the requirement to provide an identifier for every entity is "... still not (yet) enforced" but "... should be considered a deprecated feature as it will be completely required to provide a identifier property in an upcoming release." When using annotations, it seems to be required as far back as 3.3.2.GA. Perhaps the requirement is not enforced when using hbm.xml ... but is only for annotations. Should we update the document comment to clarify? Thanks! Stephen _______________________________________________ hibernate-dev mailing list hibernate-dev(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/hibernate-dev