[Typo3] link target for individual extension like sp_directory

[tapio]

Hi

Is there a generic constant for setting link target for some links, 
which plugings generate even if the plugin has not constant in the 
contant.txt file.

I would need for sp_directory for ther field 'www' a link target.

I have tried one solution in the source code.
I makes links using this function

         function makeHTTPLink($url,$name)      {
                 $this->typolink_conf["parameter"] = $url;
                 #$this->typolink_conf["target."] = "_blank";
         #$this->conf['target.']="_blank";
                 $code = $this->cObj->typolink($name, $this->typolink_conf);

     return $code;
         }

commented didnt't work.
The function 'typolink' has been defined in a core file 
(/tslib/class.tslib_content.php)

Tapio Markula