This class represents the media clip section dictionary. This is definitively detailed in:.

The ISO PDF Specification, ISO 32000-1:2008 PDF 1.7; Table: 277, page 495.

The ISO PDF Specification, ISO 32000-2:2017 PDF 2.0; Table: 288, page 620.

A media clip section dictionary defines a time-delimited portion of another media clip. It references the source clip and specifies start and end offsets, allowing a single media file to provide multiple named sections that can be played independently.

The D entry references the source media clip. The Alt entry provides alternate text descriptions of the section for accessibility.

The MH and BE entries carry must-honour and best-effort parameters. The section start and end times are given through the MhBe parameters rather than directly in the clip section dictionary.

System.Object
    WebSupergoo.ABCpdf14.Elements.Element
       WebSupergoo.ABCpdf14.Elements.MediaClipElement
          WebSupergoo.ABCpdf14.Elements.MediaClipSectionElement