<!DOCTYPE html> <head> <base href="/test"> </head> <body style="background-color: lime;"> <svg width="100" height="100"> <defs> <rect id="a" x="0" y="0" width="50" height="50" fill="lime"/> </defs> <rect x="0" y="0" width="50" height="50" fill="red"/> <use xlink:href="#a"/> </svg> </body> </html>