private void makeGrib1Vocabulary(List<GridDatatype> grids, PrintStream out) {
String stdName;
out.println("\n<variables vocabulary='GRIB-1'>");
for (GridDatatype grid : grids) {
Attribute att = grid.findAttributeIgnoreCase("GRIB_param_number");
stdName = (att != null) ? att.getNumericValue().toString() : null;
out.print(" <variable name='");
out.print(grid.getFullName());
out.print("' vocabulary_name='");
out.print(stdName != null ? stdName : "dunno");