RL:
            <span class="codefrag">fill="url(grad.svg#PurpleToWhite)"</span>. This may be easier
            to deploy.
          </li>
          
<li>
            Make sure that the reference is valid in the current SVG document.
          </li>
        
</ul>
<p>
          In any case, the referenced stuff has to be pointed to by an URL. It
          doesn't necessarily have to be a file URL, HTTP should also
          work. Also, expect a performance hit in all cases, because another XML
          fi