Hi Guru's,

Not sure if this is the right place to ask this question. I've been learning how to construct Wordpress themes. The author of the tutorial provided the markup to be inserted a file called index.php.

this index.php file and style.css file sites together in a folder called "tutorial" thats inside the "themes" folder thats inside the "wp-content" folder.

Now the code that's inside the index.php file is as below:

Code:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head profile="http://gmpg.org/xfn/11">

	<title><?php bloginfo('name'); ?><?php wp_title(); ?></title>

	<meta http-equiv="Content-Type" content="<?php bloginfo('html_type'); ?>; charset=<?php bloginfo('charset'); ?>" />	
	<meta name="generator" content="WordPress <?php bloginfo('version'); ?>" /> <!-- leave this for stats please -->

	<link rel="stylesheet" href="<?php bloginfo('stylesheet_url'); ?>" type="text/css" media="screen" />
	<link rel="alternate" type="application/rss+xml" title="RSS 2.0" href="<?php bloginfo('rss2_url'); ?>" />
	<link rel="alternate" type="text/xml" title="RSS .92" href="<?php bloginfo('rss_url'); ?>" />
	<link rel="alternate" type="application/atom+xml" title="Atom 0.3" href="<?php bloginfo('atom_url'); ?>" />
	<link rel="pingback" href="<?php bloginfo('pingback_url'); ?>" />

	<?php wp_get_archives('type=monthly&format=link'); ?>
	<?php //comments_popup_script(); // off by default ?>
	<?php wp_head(); ?>
</head>
<body>

</body>
</html>
I tried looking at Sitepoints reference to check out the <head> element and its available attribute but there was nothing about profile

What is it for?

Thank you!

Cheers,
Jaysone