xmlpp::Element* t = node->add_child ("Gain");
t->set_attribute ("Content", lexical_cast<string> (c));
t->set_attribute ("DCP", lexical_cast<string> (d));
xmlpp::Element* t = node->add_child ("Gain");
t->set_attribute ("Content", lexical_cast<string> (c));
t->set_attribute ("DCP", lexical_cast<string> (d));