internal override void SetXML(XmlElement xml, BaseClassIfc host, HashSet<int> processed)
{
base.SetXML(xml, host, processed);
if(mPlacementRelTo > 0)
xml.AppendChild(PlacementRelTo.GetXML(xml.OwnerDocument, "PlacementRelTo", this, processed));
xml.AppendChild(mDatabase[mRelativePlacement].GetXML(xml.OwnerDocument, "RelativePlacement", this, processed));
}