In practice on the World Wide Web, MIME types are often associated with particular file extensions to indicate data types. When data is referenced on an HTML page, the file extension is often used to determine the MIME type of the data. This allows the HTML engine to associate a rendering engine with a data on a page. The MIME types directly reflect the data types that are required to be supported. This proposal allows the use of trigger delivery using IP encapsulation of trigger structures.
Triggers are real-time events broadcast to announce the availability of enhanced TV content.
Receiver implementations will set their own policy for allowing users to turn on or off enhanced TV content, and can use trigger arrival as a signal to notify users of enhanced content availability. Triggers typically include a URL, a human-readable name, an expiration date, and a script. With an established record of extensibility and backward compatibility, it is a proven platform for future development. The huge base of developers, content creators and widespread tool support indicate a large amount of existing content, and the potential for immediate content generation targeted towards the digital broadcast environment. Protects the huge body of existing content, while leveraging extant tools and investments.