I think, when we are talking about changing format, in many times there is also needed change also program, not only regexp. Now it is ok, assume it will not change.

Thanks for nice answer about comparing TokeParser and TreeBuilder, that is really enough for me and I see the difference. Maybe there should be some other module putting those two propertie together (take token and have also tree stored somewhere). Dont know if it is possible. The main thing is - problem is solved, and I hope this node will help also to other monks!