Represents the "S" entry of the border style dictionary object.

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

It contains a string representing a PDF name object.

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

• S
• D
• B
• I
• U

For definitive details see:.

The ISO PDF Specification, ISO 32000-1:2008 PDF 1.7; Table: 166, page 387.

The ISO PDF Specification, ISO 32000-2:2017 PDF 2.0; Table: 168, page 470.

The style name selects the border appearance. Solid draws a continuous line; Dashed uses the D dash pattern; Beveled draws a simulated raised 3D border; Inset draws a simulated sunken 3D border; Underline draws only a line at the rectangle bottom.