Represents the "Location" entry of the signature dictionary object.

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

It contains a string representing a PDF string object.

For definitive details see:.

The ISO PDF Specification, ISO 32000-1:2008 PDF 1.7; Table: 252, page 468.

The ISO PDF Specification, ISO 32000-2:2017 PDF 2.0; Table: 255, page 567.

The location string records the physical or logical location where the signature was applied, such as a city, country, or workstation identifier. It is informational and not verified by signature validation.