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

The ISO PDF Specification, ISO 32000-1:2008 PDF 1.7; Table: 102, page 232.

The ISO PDF Specification, ISO 32000-2:2017 PDF 2.0; Table: 100, page 284.

The user usage dictionary restricts an optional content group to a specific user type or named user. Applications may use this to show content appropriate to the viewer's role.

The Type entry classifies the user as an individual or a group. This distinction allows targeting either a specific person or a category of users.

The Name entry holds the identifier of the user or user group. It may be a single string or an array of strings for multiple targets.

System.Object
    WebSupergoo.ABCpdf14.Elements.Element
       WebSupergoo.ABCpdf14.Elements.OptionalContentUsageUserElement