…ing system to match the fragment to a location in the text. Note The reason for grouping structures like sections, figures, tables, and footnotes in a seq element is so that reading systems can identify their start and end positions during playback. Reading systems can then offer…

…ing system to match the fragment to a location in the text. Note The reason for grouping structures like sections, figures, tables, and footnotes in a seq element is so that reading systems can identify their start and end positions during playback. Reading systems can then offer…