You can do a link. To learn about SVG start in our wiki. There are links to the standards and with that it is easy to find what you seek. There are two kinds of links, one for external documents and the other for internal links between elements.
Here is an example of a link done for a ellipse. It is taken from the standard.
<?xml version="1.0" standalone="no"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN"
"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
<svg width="5cm" height="3cm" viewBox="0 0 5 3" version="1.1"
xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<desc>Example link01 - a link on an ellipse
</desc>
<rect x=".01" y=".01" width="4.98" height="2.98"
fill="none" stroke="blue" stroke-width=".03"/>
<a xlink:href="http://www.w3.org">
<ellipse cx="2.5" cy="1.5" rx="2" ry="1"
fill="red" />
</a>
</svg>
Dale