| http://www.w3.org/ns/prov#value | - However, user interaction device 154 may include any suitable device for interacting with the viewing operation region 186 and other objects displayed on display device 170, including but not limited to pointing and cursor control devices for two- and three-dimensional displays, such as a light pen, track ball, joystick, or data glove device, a touch screen display, and alphanumeric devices such a
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