joomla2.5 - How to edit meta tag in Joomla 2.5 -

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i'm using custom component in joomla 2.5. need change meta tag "description" , "keywords"

how override meta tag ?

thanks answers

from joomla docs:

$doc =& jfactory::getdocument(); $doc->setmetadata( 'tag-name', 'tag-content' );

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