<?xml version="1.0" encoding="UTF-8"?>
<svg xmlns="http://www.w3.org/2000/svg" width="100" height="100">
<metadata>
<link xmlns="http://www.w3.org/1999/xhtml" rel="help" href="https://www.w3.org/TR/SVG2/shapes.html#EllipseElement"/>
<link xmlns="http://www.w3.org/1999/xhtml" rel="match" href="ellipse-04-ref.svg"/>
<meta xmlns="http://www.w3.org/1999/xhtml" name="assert" content="rx and ry auto disables rendering."/>
</metadata>
<style>
ellipse {
rx: auto;
ry: auto;
}
</style>
<ellipse cx="50" cy="50" fill="none" stroke="red" stroke-width="5"/>
</svg>