single pointer pointer input that operates with one point of contact with the screen, including single taps and clicks, double-taps and clicks, long presses, and path-based gestures specific sensory experience a sensory experience that is not purely decorative and does not primarily convey important
      information or perform a function Example Examples include a performance of a flute solo, works of visual art etc. state dynamic property expressing characteristics of a user interface component that may change in response to user action or automated processes States do not affect the nature of the component, but represent data associated with the component or user interaction possibilities. Examples include focus, hover, select, press, check, visited/unvisited, and expand/collapse. status message change in content that is not a change of context , and that provides information to the user on the success or results of an action, on the waiting state of an application, on the progress of a process, or on the existence of errors structure The way the parts of a Web page are organized in relation to each other; and The way a collection of Web pages is organized style property property whose value determines the presentation (e.g. font, color, size, location, padding, volume, synthesized speech prosody) of
 content elements as they are rendered (e.g.