I tried that - no joy.
I also looked at other svg.pcb.xxx.svg’s
In those copper1 contains copper0.
That does not work either.
This is what I have now.
<g
transform="translate(0.10254163,-4.5120007)">
<g
id="copper0"
gorn="0.5.0">
<g
id="copper1"
gorn="0.5.0.0">
<circle
id="connector41pad"
gorn="0.5.0.0.0"
connectorname="C41"
cx="3.5999999"
cy="10.8"
r="1.9400001"
fill="none"
stroke="#f7bd13"
stroke-width="1.20000005" />
<rect
id="rect611"
gorn="0.5.0.0.1"
height="3.8789999"
x="1.659"
y="8.8599997"
width="3.881"
fill="none"
stroke="#f7bd13"
stroke-width="1.20000005" />
<circle
id="connector42pad"
gorn="0.5.0.0.2"
connectorname="C42"
cx="3.5999999"
cy="18"
r="1.9400001"
fill="none"
stroke="#f7bd13"
stroke-width="1.20000005" />
…