This class represents the page label dictionary. This is definitively detailed in:.

The ISO PDF Specification, ISO 32000-1:2008 PDF 1.7; Table: 159, page 375.

The ISO PDF Specification, ISO 32000-2:2017 PDF 2.0; Table: 161, page 456.

System.Object
    WebSupergoo.ABCpdf14.Elements.Element
       WebSupergoo.ABCpdf14.Elements.PageLabelElement

A page label dictionary defines the numbering style and optional prefix for a range of pages. The PDF page label number tree maps page indices to these dictionaries so different ranges can use different numbering conventions in the same file.

The S entry selects the numbering style: decimal Arabic numerals, upper or lower Roman numerals, or upper or lower alphabetic. Omitting S causes pages in the range to be labelled with the prefix alone.

The P entry supplies a string prefix that appears before the numeric portion. The St entry sets the numeric value of the first page in the range, allowing a range to start at a number other than one.