<http://schema.org/description>
"Apple has shown interest in creating an advanced keyboard that could provide tactile feedback to users through the inclusion of numerous proximity sensors and air vents on individual keys."^^<http://www.w3.org/2001/XMLSchema#string>
<http://appleinsider.com/articles/11/05/12/apple_investigating_advanced_keyboards_with_proximity_sensors_tactile_feedback.html>