public override void writeXML(UTRSXmlWriter xml)
{
xml.WriteElementSafeString(_ID.ToLower(), ID);
xml.WriteElementSafeString(_UNIT.ToLower(), unit);
xml.WriteElementSafeString(_SYMBOL.ToLower(), symbol);
xml.WriteElementSafeString(_NOTES.ToLower(), notes);
xml.WriteElementSafeString(_DEPRECATED.ToLower(), deprecated);
xml.WriteElementSafeString(_LIMIT_LIST.ToLower(), limitList);
xml.WriteElementSafeString(_ELECTRICAL.ToLower(), electrical);
xml.WriteElementSafeString(_OPTICAL.ToLower(), optical);
xml.WriteElementSafeString(_CHEMICAL.ToLower(), chemical);
}