The following table describes the structured representation of a barcode that is passed by an encoder to the renderer as a dictionary when the PostScript is executed.

Element                Key  Value
-------                ---  -----
Space bar succession   sbs  Array containing the widths, in points, of
                            each bar and space, starting with the
                            leftmost bar.
Bar height succession  bhs  Array containing the height of each bar
                            in inches, starting with the leftmost bar.
Bar base succession    bbs  Array containing the offset of the base of
                            each bar in inches, starting with the
                            leftmost bar.
Human readable text    txt  Array of arrays that contain the character,
                            position, height, font and scale factor
                            (font size), in points, for each of the
                            visible text characters.
Renderer options       opt  String containing the user-defined renderer
                            options.

Other keys and values may be contained in this structure that override the render defaults with encoder specific defaults.

The structure is the complete internal representation of the barcode and can be enumerated with the following modified invokation which writes to the standard output stream:

0 0 moveto (^104^102Count^0990123456789^101!) (includetext) code128 {exch == ==} forall flush

For the above code, GhostScript generates the following on STDOUT:

/bhs
[1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0
1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0
1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0]
/sbs
[2 1 1 2 1 4 4 1 1 1 3 1 1 3 1 3 2 1 1 3 4 1 1 1 1 2 4 2 1 1 2 4 1 1 1
2 1 2 4 1 1 2 1 1 3 1 4 1 2 2 2 1 2 2 3 1 2 1 3 1 1 1 3 1 2 3 1 4 1 1 2
2 2 1 2 1 4 1 3 1 1 1 4 1 2 2 2 1 2 2 3 1 2 1 1 3 2 3 3 1 1 1 2]
/opt
(includetext)
/bbs
[0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0]
/txt
[[( ) 0 -7.0 /Courier 10.0] [( ) 11 -7.0 /Courier 10.0] [(C) 22 -7.0
/Courier 10.0] [(o) 33 -7.0 /Courier 10.0] [(u) 44 -7.0 /Courier 10.0]
[(n) 55 -7.0 /Courier 10.0] [(t) 66 -7.0 /Courier 10.0] [( ) 77 -7.0
/Courier 10.0] [(01) 88 -7.0 /Courier 10.0] [(23) 99 -7.0 /Courier
10.0] [(45) 110 -7.0 /Courier 10.0] [(67) 121 -7.0 /Courier 10.0] [(89)
132 -7.0 /Courier 10.0] [( ) 143 -7.0 /Courier 10.0] [(!) 154 -7.0
/Courier 10.0]]