This class represents the selector rendition dictionary. This is definitively detailed in:.

The ISO PDF Specification, ISO 32000-1:2008 PDF 1.7; Table: 272, page 492.

The ISO PDF Specification, ISO 32000-2:2017 PDF 2.0; Table: 283, page 616.

A selector rendition contains an ordered array of renditions and selects the first one whose playback criteria are satisfied. It provides a fallback mechanism when a document must support a range of playback environments.

The R entry holds the array of rendition dictionaries to try in order. A conforming reader evaluates each candidate's criteria in sequence and activates the first rendition that qualifies. If no candidate qualifies, nothing plays.

Selector renditions may be nested: an element of the R array may itself be a selector rendition, allowing hierarchical fallback strategies.

System.Object
    WebSupergoo.ABCpdf14.Elements.Element
       WebSupergoo.ABCpdf14.Elements.RenditionElement
          WebSupergoo.ABCpdf14.Elements.SelectorRenditionElement