The svg:set element...

On the face of it, the svg:set element does not seem to be as much fun as the others. In fact you can achieve the same effect by setting the @calcMode to 'discrete' which has the effect of not interpolating between the extremes.

Anyway, I now have support for svg:set.

I was supposed to be doing svg:animateMotion next but svg:set seemed easier by far than the whole motion path, keyPoints, keyTimes and keySplines scene!