coords-unitsProc-BE-04.svg: still don't get it.

Hello.

I still don't get how to deal with absolute and relative values.
in coords-unitsProc-BE-04.svg, we have:

<g transform="translate(15, 45) scale(2)">
                        <!-- Draw marker using user space units -->
                        <circle cx="7.5" cy="7.5" r="2.5"
style="fill:black"/>
                        <!-- Draw CSS marker using px units -->
                        <circle cx="7.5px" cy="7.5px" r="1.5px"
style="fill:red"/>
                </g>


is cx (7.5px) in the red circle affected by the scale(2) transform in
the
parent group ?

thanks,

--
stephane conversy
ecole des mines de nantes