Represents the "XObject" entry of the resource dictionary object.

It is an optional entry defined as part of the PDF 1.0 specification.

It contains an Element.

For definitive details see:.

The ISO PDF Specification, ISO 32000-1:2008 PDF 1.7; Table: 33, page 83.

The ISO PDF Specification, ISO 32000-2:2017 PDF 2.0; Table: 34, page 112.

The XObject entry maps resource names to XObject streams (image, form, or PostScript). A content stream paints a named XObject using the Do operator, which executes the XObject in the current graphics state.