The doclet.xml is a configuration file used to initiate the builders. It does not quite help in any way, than make things more complicated for instance it calls the builder's methods reflectively which is not a "good thing", and debugging is not an easy task, as extra steps need to be taken to insert next break point etc. Also it uses obsolete nomenclature.

Describing the doclet.xml in a java class and ordering the callees will be better served.