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2.1.1136 Part 1 Section 19.5.9, audio (Audio)

For additional notes that apply to this portion of the standard, please see the notes for tnLst, §19.5.87(b) .

a. The standard allows the isNarration attribute to be set to true on any audio element.

The isNarration attribute can only be true if the <audio> element contains a child <cMediaNode> ("[ISO/IEC-29500-1] §19.5.29; cMediaNode") with a child <tgtEl> ("[ISO/IEC-29500-1] §19.5.81; tgtEl") that contains a <spTgt> element ("[ISO/IEC-29500-1] §19.5.72; spTgt") that points to a valid sound shape. A valid sound shape is a shape that includes as a child of the <nvPr> element ("[ISO/IEC-29500-1] §19.3.1.33; nvPr") one of the following elements: <wavAudioFile> ("[ISO/IEC-29500-1] §20.1.3.7; wavAudioFile") or <audioFile> ("[ISO/IEC-29500-1] §20.1.3.2; audioFile").

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