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INTERACTION DESIGN PRINCIPLES FOR INTERACTIVE ...

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EXTENSIBLE MARKUP LANGUAGE (XML)<br />

A general-purpose markup language for creating special-purpose markup languages.<br />

XML has been chosen as the standard for producing interactive applications because of<br />

its ability to be understood by both people and machines, its general acceptance as an<br />

open method for transferring data, and its compatibility with all of the major iTV<br />

platforms.<br />

HIGH-DEFINITION TELEVISION (HDTV)<br />

A digital broadcast television signal with a higher resolution than NTSC. An HDTV-<br />

compatible TV usually has a 16:9 aspect ratio.<br />

<strong>INTERACTIVE</strong> PROGRAMMING GUIDE (IPG)<br />

See Electronic Programming Guide<br />

<strong>INTERACTIVE</strong> TELEVISION (iTV)<br />

Any television or video programming that incorporates enhanced content or some style of<br />

user interactivity, for example, providing synchronized trivia content during a broadcast,<br />

allowing viewers to vote on the outcome of a show, or digitally recording video onto a<br />

hard drive so viewers can time-shift while watching a program. ITV is also used as an<br />

umbrella term to cover the convergence of television with digital media technologies<br />

such as computers, personal video recorders, game consoles, and mobile and wireless<br />

devices, enabling user interactivity.<br />

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