Represents the "TI" entry of the rich-media-execute action object.

It is an optional entry defined as part of the PDF 1.7 Extension Level 3 specification.

It contains a RichMediaInstanceElement.

For definitive details see:.

Adobe Supplement to the ISO 32000, BaseVersion: 1.7, ExtensionLevel: 3; Table: 8.48a, page 40.

The ISO PDF Specification, ISO 32000-2:2017 PDF 2.0; Table: 222, page 523.

The target instance references the specific rich media instance within the annotation's content to which the command is directed. If absent the command is sent to the currently active instance.