The extensible logo

When you choose to use textual links, that are not as visible as buttons, it is better to inform your visitors the page is extensible with this logo:

and in all case you can also inform your visitors to what extensible page is by a link on this page:

<a href="http://ajax.xul.fr/extensible/official.html" target="_top"> <img  src="extensible.jpg"> </a>