rel=canonical attribute

[Graemezee]

Most of the info and plugins i have found for Joomla seem to focus on duplicate content within a site I manage a networking groups site and the members would like to re post blogs and articles from their own site on the networking site

I am looking for some way to slip the rel=canonical attribute for the particular article in the header page of this article

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<link href="URL OF ORIGINAL PAGE" rel="canonical" />  

any thoughts appreciated

[Graemezee]

Have been looking at PHPDirect and Sourcer to try and insert the rel=canonical attribute
into the header with something like:

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$document  =& JFactory::getDocument();
$document->addCustomTag('<link rel="canonical" href="URL OF ORIGINAL PAGE"/>');?>

or

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<?php $doc->addCustomTag( '<link rel="canonical" href="URL OF ORIGINAL PAGE";/>' );?>

even

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<?php  $document->addCustomTag(  '<link rel="canonical" href="URL OF ORIGINAL PAGE" />' );?>    

Mostly nothing happens or the screen goes white appreciate any help even to know if this is possible.

[sozzled]

see, perhaps, viewtopic.php?f=712&t=959300