I install JBossIDE-1.6.0.GA-Bundle-win32 and jboss-4.0.4.GA I create a new EJB3 project I create the folowing EntityBean : ---------------------------------------------------------------------------------- import java.io.Serializable; import java.util.Collection; import javax.persistence.CascadeType; import javax.persistence.Column; import javax.persistence.Entity; import javax.persistence.FetchType; import javax.persistence.GeneratorType; import javax.persistence.Id; import javax.persistence.JoinColumn; import javax.persistence.OneToMany; import javax.persistence.Table; @Entity @Table(name = "COUNTRY") public class CountryEntity implements Serializable { int numCountry; String labelCountry; String code2Country; String code3Country; private Collection persons; @Id( generate = GeneratorType.AUTO) @Column (name = "NUM_COUNTRY") public int getNumCountry() { return numCountry; } public void setNumCountry(int numCountry) { this.numCountry = numCountry; } @Column (name = "LABEL_COUNTRY") public String getLabelCountry() { return labelCountry; } public void setLabelCountry(String labelCountry) { this.labelCountry = labelCountry; } @Column (name = "CODE2_COUNTRY") public String getCode2Country() { return code2Country; } public void setCode2Country(String code2Country) { this.code2Country = code2Country; } @Column (name = "CODE3_COUNTRY") public String getCode3Country() { return code2Country; } public void setCode3Country(String code3Country) { this.code3Country = code3Country; } @OneToMany(cascade=CascadeType.ALL, fetch=FetchType.LAZY, mappedBy="country") @JoinColumn(name="FK_COUNTRY") // Foreign key in PERSON public Collection getPersons() { return persons; } public void setPersons(Collection persons) { this.persons = persons; } } ---------------------------------------------------------------------------------- But the Eclipse IDE do not reconise the class javax.persistence.GeneratorType "The import javax.persistence.GeneratorType cannot be resolved" View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3972969#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...