Is there a certain format that rt's follow like 4 or 8 bar patterns or loops

It's been a long time since I looked at a rt as a sound file but I seem to remember something like that.

Would you create several instrument tracks then merge to one?

Could you use loops?
Does anyone know yet?
Hey this is Christmas as far as I'm concerned smile
I just ordered 2014 and looking forward to what this might work into.
Wyndham