I had been considering that we would support the keyword used (expander/transform) as an option to the model transformation system, so that we could support old-style transforms if necessary, but the work involved in pushing this configuration to these leaf functions is so abominable that I am feeling it is not worth it. Probably allowing the use of old-style transformation documents will just cause confusion anyway. We should try to talk about this with Colin tomorrow (Tuesday) before he goes away.