[css3-transitions] Transition events on shorthands

Hi,

After reading some blog posts [1], I wonder what happens to Transition Events on animating shorthand properties.

1) Should just the shorthand with its property name fire?
2) Should just the longhand with their property names be fire?
3) Should long and shorthands fire?
4) Should just changing longhands fire?
5) What happens if both change?

Greetings,
Dirk

[1] http://coding.smashingmagazine.com/2013/04/26/css3-transitions-thank-god-specification/