<http://schema.org/description>
"The inactivity timeout governs when a user's login session is invalidated based upon inactivity. This article will highlight best practices that are implemented by default and how you can change the default if you need a more aggressive timeout."^^<http://www.w3.org/2001/XMLSchema#string>
<https://success.mindtouch.com/Documentation/MindTouch4/Authentication/Best_practices/Best_Practice%3A_Inactivity_Timeout>