🚀 go-pugleaf

See the earlier responses from Chuck and Wilson for two options.

To make it a little easier to use AGS's set command to replace the outer tag, write your SVG with one or more <g> tags

<svg>
<g>
<circle ... />
</g>
... other stuff
</svg>

Then replace the old <g> with just the circle with the new one that has both the circle and the ellipse. (The logic and code to do this would have to happen outside of AGS.)

<svg>
<g>
<circle ... />
<ellipse ... />
</g>
... other stuff
</svg>

Or something like this might work with predefined placeholders :
<svg>
<g id="circle" >
<circle ... />
<g id="empty1"></g>
<g id="empty2"></g>
</svg>

Then you can replace the empty g's...