escaping characters for substitution into a PDF

Question

Can anyone tell me the set of control characters for a PDF file, and how to escape them? I have a (non-deflated (inflated?)) PDF document that I would like to edit the text in,

Answer 1

Okay, I think I found it. On page 15 of the PDF 1.7 spec (PDF link), it appears that the only characters I need to worry about are the parentheses and the backslash.

Sequence | Meaning
---------------------------------------------
\n       | LINE FEED (0Ah) (LF)
\r       | CARRIAGE RETURN (0Dh) (CR) 
\t       | HORIZONTAL TAB (09h) (HT)
\b       | BACKSPACE (08h) (BS)
\f       | FORM FEED (FF)
\(       | LEFT PARENTHESIS (28h)
\)       | RIGHT PARENTHESIS (29h)
\\       | REVERSE SOLIDUS (5Ch) (Backslash)
\ffffd     | Character code ffffd (octal)

Hopefully this was helpful to someone.