Zend certified PHP/Magento developer

How to add SKU in the attribute list in the More Information tab of the product view page?

I have added the following code to catalog_product_view.xml to show the SKU in the list of attributes inside the “More information” tab


  
      
        getSku
        sku
        sku
      
    

The other customizations in the file are visible, but not this one. Any idea?