The same attributes may be needed in multiple groups. To avoid coping, something like this would be nice:
<group-style name="important" p.border="2mm solid red" font.color="red">
...
<group style="important">
<p><b>Warning!!!</b></p>
<p>Important information.</p>
</group>
The same attributes may be needed in multiple groups. To avoid coping, something like this would be nice: