Represents the "MDP" entry of the signature field seed value dictionary object.

It is an optional entry defined as part of the PDF 1.6 specification.

It contains an Element.

For definitive details see:.

The ISO PDF Specification, ISO 32000-1:2008 PDF 1.7; Table: 234, page 448.

Adobe Supplement to the ISO 32000, BaseVersion: 1.7, ExtensionLevel: 3; Table: 8.83, page 44.

The ISO PDF Specification, ISO 32000-2:2017 PDF 2.0; Table: 237, page 543.

The MDP entry constrains which DocMDP permission level the signer may certify the document with. It is an integer matching the P values in the DocMDP transform parameters dictionary.