*/
public void readExternal( ObjectInput in )
throws IOException, ClassNotFoundException
{
FormatableLongHolder flh;
FormatableHashtable fh = (FormatableHashtable)in.readObject();
name = (String)fh.get("name");
dataType = (DataTypeDescriptor) fh.get("dataType");
defaultValue = (DataValueDescriptor)fh.get("defaultValue");