This class represents the optional content group dictionary. This is definitively detailed in:.

The ISO PDF Specification, ISO 32000-1:2008 PDF 1.7; Table: 98, page 222.

The ISO PDF Specification, ISO 32000-2:2017 PDF 2.0; Table: 96, page 273.

This class is always an indirect object because OptionalContentPropertiesElement.EntryOCGs requires it to be so.

An optional content group (OCG) is a named object that controls whether associated content is rendered. Content associated with a group is shown when the group is on and hidden when it is off.

The Name entry provides a human-readable label for the group. This name is typically shown in a viewer's layer panel to allow users to toggle visibility.

The Intent entry constrains how the group is used. A group intended for View may be toggled freely by the user; one intended for Design may be used by authoring tools for design layer control. Multiple intents may be listed.

The Usage entry holds a dictionary that describes the real-world conditions under which the group should be on or off, such as a zoom level range, a print condition, or a language preference. Viewers and processors use this information to set group states automatically.

System.Object
    WebSupergoo.ABCpdf14.Elements.Element
       WebSupergoo.ABCpdf14.Elements.OptionalContentGroupElement