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I have 4 persistent classes which all have the same fields (exactly) the only 3 difference between them is 1) the class name, 2) the table name and 3) the data. i am aware that this might seem strange to some but trust me there is a good reason which i won't go into here. now, i'm using hibernate annotations to configure my class which should work like so: @Entity @Table(name = "store") public class Store { @Id @Column(name = "unique_id") protected String id; @Column protected String category; ... } .. and this does work, for a single stand-alone class, however there are many fields to map and i'd like to do it all in one hit for all four similar classes, ie: public class StoreBase { @Id @Column(name = "unique_id") protected String id; @Column protected String category; ... } @Entity @Table(name = "store1") public class Store1 extends StoreBase {} @Entity @Table(name = "store2") public class Store2 extends StoreBase {} @Entity @Table(name = "store3") public class Store3 extends StoreBase {} @Entity @Table(name = "store4") public class Store4 extends StoreBase {} however when attempting this i get the following exception: Caused by: org.hibernate.AnnotationException: No identifier specified for entity: package.entities.Store1 at org.hibernate.cfg.AnnotationBinder.bindClass(AnnotationBinder.java:672) at org.hibernate.cfg.AnnotationConfiguration.processArtifactsOfType(AnnotationConfiguration.java:546) at org.hibernate.cfg.AnnotationConfiguration.secondPassCompile(AnnotationConfiguration.java:291) at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1292) at org.hibernate.cfg.AnnotationConfiguration.buildSessionFactory(AnnotationConfiguration.java:867) i'm guessing this is because the super class is not being searched for the identifier? is there a way to utilise inheritance in this context? thanks, pa

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