| http://www.w3.org/ns/prov#value | - Typically the user interface of the instrument will include a touch-sensitive display for both prompting the user to select a test to be performed and to allow the user to input various data items required, as well as displaying the test results; however, the same functions could be provided by a display screen and a separate user input device, such as a keyboard or keypad, or a mouse, trackball,
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