Representation - Grade-A-Software/Comcast-DASH-VLC GitHub Wiki
The Representation provides information about video quality.
The Representation class is a basic data structure corresponding to the video quality information for a video stream. The bandwidth information and video display size is provided by this XML element, and the Representation class contains this data.
The Representation identifies a subset of media files on the server.
The most important detail in the Representation object is its ID. In fact, all media file names are inherently based on the ID attribute of the Representation.