* These items are included in the CSS Trends Report. Page 1 of 12 N Name Description 2014 2013 2012 2011 201

ontologies and architectures to the relative merits of individual tools and methods. A recurring theme was the benefits—or lack thereof—of hierarchical systems: A majority of the attendees supported the position that hierarchy was necessary: Low-level subsystems process sensory input and execute control strategies, and higher-level systems select control strategies appropriate for the task at h...