// FIXME: here we should write the objects, but that's not
// possible with the current API. we don't need that for the
// genetic algorithm at the moment, but it would be useful.
pp.startElement("schema", null);
writeElement(pp, "threshold", "" + config.getThreshold());
if (config.getMaybeThreshold() != 0.0)
writeElement(pp, "maybe-threshold", "" + config.getMaybeThreshold());