Represents the "NodeNameList" entry of the dpartroot dictionary object.

It is an optional entry defined as part of the PDF 2.0 specification.

It contains an array which contains strings, representing PDF name objects.

For definitive details see:.

The ISO PDF Specification, ISO 32000-2:2017 PDF 2.0; Table: 408, page 829.

The NodeNameList entry holds an array of name strings labelling each level of the hierarchy. The first name labels the root level. These names help processors understand the semantic structure.