The assertions associated with the offset if any.
The time offset in seconds from the start of the media.
OptionalsrcThe character offset within the source EPUB CFI string corresponding to this node.
The type of offset.
The x-coordinate as a value between 0 to 100. If specified, the y-coordinate must also be specified.
The y-coordinate as a value between 0 to 100. If specified, the x-coordinate must also be specified.
Describes a temporal offset within a media element, and optionally spatial coordinates.