*/
private void unpackLivingSubjectPersonIdentifiers(Person p, Element e, String oidPersonIdentifier, PersonIdentifier.Type type) {
List<Element> idList = unpackGetLivingSubjectIdList(e, oidPersonIdentifier);
for (Element id : idList) {
Element v = (Element) id.getElementsByTagName("value").item(0); // unpackGetLivingSubjectIdList() guarantees this exists.
PersonIdentifier pi = new PersonIdentifier();
pi.setIdentifier(unpackAttribute(v, "extension"));
pi.setIdentifierType(type);
if (p.getPersonIdentifierList() == null) {
p.setPersonIdentifierList(new ArrayList<PersonIdentifier>());
}
p.getPersonIdentifierList().add(pi);
}