Represents the "Measure" entry of the form XObject dictionary object.

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

It contains a MeasureElement.

For definitive details see:.

The ISO PDF Specification, ISO 32000-1:2008 PDF 1.7; Table: 95, page 218.

Adobe Supplement to the ISO 32000, BaseVersion: 1.7, ExtensionLevel: 3; Table: 4.45, page 27.

The ISO PDF Specification, ISO 32000-2:2017 PDF 2.0; Table: 93, page 270.

The ISO PDF Specification, ISO 32000-1:2008 PDF 1.7; Table: 363, page 632.

The ISO PDF Specification, ISO 32000-2:2017 PDF 2.0; Table: 399, page 812.

The Measure dictionary attaches real-world measurement data to the form, mapping form coordinates to physical units. This supports geospatial and engineering workflows where precise spatial referencing of form content is required.