TDG_XML_VERTICES
vertices = get_child_by_name(root, (xmlChar *)TDG_XML_VERTICES);
xmlStrcmp(vertices->name, (xmlChar *)TDG_XML_VERTICES) != 0) {
TDG_XML_VERTICES);
(void) fprintf(fp, "<%s>\n", TDG_XML_VERTICES);
(void) fprintf(fp, "</%s>\n", TDG_XML_VERTICES);