PdfDocumentCreateSettingsPdfStandard Property

The PDF standard the document conforms to. When the standard requires a tagged PDF, like PDF/UA-1, PDF/UA-2 or PDF/A-2a, the elements added to the document are inserted into the structure tree with the roles given by their Accessibility properties. The default value is PdfStandard.None

public PdfStandard PdfStandard { get; set; }