I'm playing with the API (v1.4) -- very nice!

My plan was to write a small python app that would periodically look at the <bw-out> of a <slice> and alert you if a slice's extrapolated network traffic was projected to exceed its monthly budget. The only thing missing for this is the slice's billing day. Without that, I can't tell how much time the given <bw-out> has had to accrue, and hence can't compute the rate.

What about adding an e.g. '<billing-start>' element that gives the day of the month on which the slice's traffic count is zeroed?

Thanks kindly.