Delete cyclic appointments

Hello,

I'm using XML-RPC interface to create and manage appointments.
The appointment.delete method works fine for deleting a single appointment,
but I want to know if there is a way to delete all appointments in a cycle
in one turn. The XML-RPC interface is missing such e method. And also the
parentDateId for the appointments doesn't appear in the appointment XML-RPC
structure so that I could use it to delete cyclic appointments "by hand".

I hope you could suggest any decision for my problem.
Thanks