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This function derives the content of the object as it will be
inserted into the final PDF document.
There are many ways in which a string may be represented. The
format string allows more control over how this is done.
The following options may be used in combination.
- l - literal format with unusual characters escaped in
octal
- x - hexadecimal format with all characters represented in
hex
- lx - best choice literal or hexadecimal format depending on the
content of the string
- b1 - allow the string to be broken over multiple lines
- b0 - do not allow the string to be broken over multiple
lines
- r1 - allow random elements when applying a crypt filter
- r0 - do not allow random elements when applying a crypt
filter
If format options are not specified then ABCpdf will select a
sensible set depending on context.
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