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Nested Sets Model
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<h1>Nested Sets Model</h1>

<p>The nested sets model class was created by 'thunder uk' on the <a href="http://www.codeigniter.com">CodeIgniter</a> forums, there is a inactive thread <a href="http://codeigniter.com/forums/viewthread/47671/">here</a>. 
I did not create this class but <strong>BackendPro</strong> uses it in the administration control panel 
to allow the user to manage access control permissions. For full documentation on its methods please see <var>system/application/models/Nested_sets_model.php</var>.</p>

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