====== addHeadLink ======
{#JAPI Joomla.Framework Document JDocumentHTML::addHeadLink #}

Adds <link> tags to the head of the document. $relType defaults to 'rel' as it is the most common relation type used. 'rev' refers to reverse relation. 'rel' indicates normal, forward relation. Typical tag: <link href="index.php" rel="Start">.
===== Syntax =====
void addHeadLink	( **$href**, **$relation**, **$relType**, **$attribs**, **$attributes** )
| **$href** | string | is a string containing the link that is being related. |
| **$relation** | string | is a string containing the relation of the link. |
| **$relType** | string | is a string containing the relation type attribute.  This can be either rel (normal, forward relation) or rev (reverse relation). This parameter is optional and if omitted defaults to 'rel'. |
| **$attributes** | array | is an associative array of the remaining attributes. This parameter is optional, and if omitted defaults to an empty array. These attributes are appended to the end of the head link tag. |

===== Examples =====
Add a head link to the page.
<code php|Example>
global $mainframe;

$document =& JFactory::getDocument();
$document->addHeadLink( "http://www.gnu.org/copyleft/fdl.html", 'copyright', 'rel', array( 'charset' => 'UTF-8' ) );
</code>
adds the following code to the head block:
<code php|Result>
<link href="http://www.gnu.org/copyleft/fdl.html" rel="copyright" charset="UTF-8" />
</code>