Smart peripheral architecture for portable media players

摘要

A new peripheral architecture is provided that allows a UI document to be embedded into a peripheral. The UI document is sent to a portable media player when the peripheral is plugged into the portable media player. The portable media player interprets this UI document to allow a user to interact with the accessory. The peripheral does not interpret this UI document but it does respond to interactions with the portable media player as the portable media player interprets the documents in response to user interactions.