indicates the location of any form of external media such as
an audio or video clip etc.
Figure One: The View from the Bridge
A Whistleresque view showing four or five sailing boats in the foreground, and a
series of buoys strung out between them.Ten seconds of bellringing soundA 45 minute video clip to be displayed in a window 500
px wide
維納斯
波提且利 1484-1486年 畫布、蛋彩 佛羅倫斯，烏菲滋美術館
The attributes available for this element are not appropriate in
all cases. For example, it makes no sense to specify the temporal duration of a
graphic. Such errors are not
currently detected.
The mimeType attribute must be used to specify the MIME media type of
the resource specified by the url attribute.