To distinguish between HTML and Facebook commands, we prefix the tags with fb: By using the FBML tag set, Facebook abstracts a lot of complex code and makes many of the routine procedures almost effortless. For example, to add a link to your applications help pages on your dashboard (the navigational tabs that go across the top), you simply need to add the following lines:
<fb:dashboard>
<fb:help href="help.php">Application Help</fb:help>
</fb:dashboard>
