[css-compositing] blending and inline SVG

All,

I was editing the chapter on isolation [1] and wondered if inline svg
should happen in an isolated group. (So the <svg> tag would establish a new
group/stacking context)
It seems that it would be very hard to implement if this was not the case.

Is everyone that inline SVG is always isolated?

We also need to discuss what other constructs in SVG create isolation. The
current filter spec assumes that nothing does, but that doesn't correspond
with reality.

1:
https://dvcs.w3.org/hg/FXTF/rawfile/default/compositing/index.html#isolation