public void AddLevel(string ID, string parent_id, string level_code)
{
AddSegment(SegmentFactory.GetHierarchicalLevel(ID, parent_id, level_code, false));
}
public void SetHeader(string ID, string level_code)
{
_id = ID;
header = SegmentFactory.GetHierarchicalLevel(ID, "", level_code, true);
AddSegment(header);
}