Represents the "IDS" entry of the name dictionary object.

It is an optional entry defined as part of the PDF 1.3 specification.

It contains a NameTreeNodeElement containing WebCaptureContentSetElements.

For definitive details see:.

The ISO PDF Specification, ISO 32000-1:2008 PDF 1.7; Table: 31, page 81.

Adobe Supplement to the ISO 32000, BaseVersion: 1.7, ExtensionLevel: 3; Table: 3.28, page 23.

The ISO PDF Specification, ISO 32000-2:2017 PDF 2.0; Table: 32, page 108.

The IDS entry references a name tree used by the web capture mechanism to map web capture identifiers to web capture page sets. These identifiers link captured pages back to their source URLs.