L7812ABV is tab functions as heatsink and can it be connected to GND for power dissipation

[h441BZZ]

Hello,

The datasheet doesn't seem to mention the function the tab on the back of the IC. Can I connect it to GND to thermally conduct the heat out? 

Thanks

[h441BZZ]

Please delete the thread, I searched by word "tab" and nothing showed up, but it does show tab as GND.