EDIT

	@Cascade({CascadeType.SAVE_UPDATE,CascadeType.MERGE})

	private AgentBase<?> agent;

    @XmlElement(name = "TimePeriod", type= String.class)

    private TimePeriod timePeriod = TimePeriod.NewInstance();

    @XmlElement(name = "CitationMicroReference")

    private String citationMicroReference;

    @XmlElement(name = "Accessed", type= String.class)

    private TimePeriod accessed = TimePeriod.NewInstance();

    @XmlElement(name = "OriginalInfo")

    private String originalInfo;