internal override void parseJObject(JObject obj)
{
base.parseJObject(obj);
JObject jobj = obj.GetValue("Unit", StringComparison.InvariantCultureIgnoreCase) as JObject;
if (jobj != null)
Unit = extractObject<IfcNamedUnit>(jobj);
JToken token = obj.GetValue("Exponent", StringComparison.InvariantCultureIgnoreCase);
if (token != null)
Exponent = token.Value<int>();
}