What does the Information Element with ElementID 221 represent in 802.11?

Hello

Please could some one shed light on what the Info Element with ID 221 represent? This element is found in beacons and probe responses. I searched the net anf found out that this element is generally used for WPA related stuff. But many places mention different uses for this element like for WMM, QOS. Some say it is a generic info elem which can be used for any stuff. If that is so then what is its format?

Nishchal