<url> – external referencenamePossible Contents: (Text | inline element)*
Description:
The contents of this element is hyperlinked with name. For
printed output, the URL is printed in parentheses after the contents.
If the element is empty, the name in printed with typewriter
style and is linked with itself.
<url name="http://www.w3c.org">W3C</url>
This yields
W3C
whereas
<url name="http://www.w3c.org"/>
leads to
http://www.w3c.org