Patent ID: 7962015

Claim:
A non-transitory computer readable information storage medium comprising: AV data; and a markup document configured to be utilized to reproduce the AV data in an interactive mode comprising a full mode and an embedded mode, wherein the markup document comprises first event information that, when read by an ENAV engine, causes the ENAV engine to inform, by default, an AV playback engine, which plays back the AV data, of an occurrence of a key input event corresponding to a user action, and second event information that, when read by the ENAV engine, causes the ENAV engine to prohibit informing the AV playback engine, which decodes the AV data, of the occurrence of the key input event, wherein the first event information comprises event registration information to check whether the user performed the action and event handling information to handle the event by controlling an operation of the AV playback engine when the key input event occurs, and wherein the first event information and the second event information are read by the ENAV engine when the AV data is reproduced in the interactive mode comprising the full mode and the embedded mode.