Represents the "N" entry of the named action object.

It is a required entry defined as part of the PDF 1.0 specification.

It contains a string representing a PDF name object.

This item may take one of the following valid values:.

• NextPage
• PrevPage
• FirstPage
• LastPage

For definitive details see:.

The ISO PDF Specification, ISO 32000-1:2008 PDF 1.7; Table: 212, page 427.

The ISO PDF Specification, ISO 32000-2:2017 PDF 2.0; Table: 216, page 518.