Importing am SVG image from within an SVG

Hi,

I'm trying to put an svg image into an svg.
How can I do this? With the <image> it doesn't work.

I used:

 <image x="69.38174" y="367.09085" 
xmlns:xlink="http://www.w3.org/1999/xlink"
 xlink:href="test.svg" width="216.0" height="108.0" />

Can anybody help?

Thanks

Adrian