Look at the javadoc and how it's deployed on sweethome3d.com. The following threads might help you too:
http://www.sweethome3d.com/support/foru ... hread,1113
http://www.sweethome3d.com/support/foru ... hread,1454
http://www.sweethome3d.com/support/foru ... hread,1435
http://www.sweethome3d.com/support/foru ... hread,2608

There's no other documentation about this subject, but feel free to write one if you want.