internal override void SetXML(XmlElement xml, BaseClassIfc host, HashSet<int> processed)
{
base.SetXML(xml, host, processed);
xml.SetAttribute("Operator", mOperator.ToString().ToLower());
xml.AppendChild(mDatabase[mFirstOperand].GetXML(xml.OwnerDocument, "FirstOperand", this, processed));
xml.AppendChild(mDatabase[mSecondOperand].GetXML(xml.OwnerDocument, "SecondOperand", this, processed));
}