/*
   * Loads a concept group from XML element
   */
  private Group loadGroup(Element element) {
    Group group = new Group();
    group.name = element.getAttributeValue("name");

    List children = element.getChildren("concept");
    for (Iterator it = children.iterator(); it.hasNext(); ) {
      Concept concept = new Concept();
      Element e = (Element) it.next();
      concept.id = (e.getAttributeValue("id"));
      concept.rubric = (e.getAttributeValue("rubric"));
      group.addConcept(concept);
    }
    return group;
  }