Represents the "Encoding" entry of the type 1 font dictionary object.

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

This property may contain one of two different types:.

1) A string representing a PDF name object.

This item may take one of the following valid values:.

• MacRomanEncoding
• MacExpertEncoding
• WinAnsiEncoding

2) An EncodingElement.

For definitive details see:.

The ISO PDF Specification, ISO 32000-1:2008 PDF 1.7; Table: 111, page 255.

The ISO PDF Specification, ISO 32000-2:2017 PDF 2.0; Table: 109, page 311.