TRANS13 — Synchronization issue?

Summary: Synchronizations which are registered with a top-level transaction are
only informed when the transaction commits (at the start and end of the
2-phase protocol). The intention is that they can then make any
transient data available to the appropriate resource. Is there not a
requirement (or wouldn"t it be a good idea anyway) that they should be
informed if the transaction simply rolls back (i.e., rollback is called
on the Coordinator rather than commit), so that they can remove
transient data, do garbage collection etc?

The resolution for this issue is to change the OTS specification so that it is clear that only the a