Composite Builds

Greetings:

I have been keeping a close eye on Calcutta and am very interested in the new Composite build feature.

Given the roadmap description
"Ability to divide a single build procedure into several parts/builds that can be run on different agents both in sequence or in parallel"

I understand that the release is not final but I am looking for documentation on that option. Can anyone point me some procedures or best practices when creating a Composite build in TC?

Thanks.