mediaobject — A displayed media object (video, audio, image, etc.)
This element contains a set of alternative “media objects.” Exactly one object will be selected and rendered.
Formatted as a displayed block. The primary purpose of the
mediaobject is to provide a wrapper around a set of
alternative presentations of the same information.
If possible, the processing system should use the content of the
first object within the
mediaobject. If the first
object cannot be used, the remaining objects should be considered in
the order that they occur. A processor should use the first object
that it can, although it is free to choose any of the remaining
objects if the primary one cannot be used.
Under no circumstances should more than one object in a
mediaobject be used or presented at the same
For example, a
mediaobject might contain a
video, a high-resolution image, a low-resolution image, a long text description, and a short text description. In a “high-end” online system, the video is used. For print publishing, the high-resolution image is used. For other online systems, either the high- or the low-resolution image is used, possibly including the short text description as the online alternative. In a text-only environment, either ...