EDIT

    @XmlElementWrapper(name = "Descriptions")

    @XmlElement(name = "Description")

    @OneToMany(mappedBy="describedSpecimenOrObservation", fetch = FetchType.LAZY)

    @ContainedIn

    @NotNull

    private Set<DescriptionBase> descriptions = new HashSet<DescriptionBase>();

    @XmlJavaTypeAdapter(MultilanguageTextAdapter.class)

    @OneToMany(fetch = FetchType.LAZY, orphanRemoval=true)

    @MapKeyJoinColumn(name="definition_mapkey_id")

    @IndexedEmbedded

    @NotNull

    protected Map<Language,LanguageString> definition = new HashMap<Language,LanguageString>();

    @XmlIDREF

    @XmlSchemaType(name = "IDREF")

    @ManyToMany(fetch=FetchType.LAZY)

    @NotNull

    protected Set<DerivationEvent> derivationEvents = new HashSet<DerivationEvent>();