[pdftex] Wordwrap in PDF document properties

[valter violino]

i use code listed below to set text which appears 
as document property of  a PDF document viewed 
with Acrobat Reader (shortcut key: Ctrl-D). 

\hypersetup{%
backref,%
pdfauthor = {my name},%
pdftitle = {my document wordwrapped title},%
pdfsubject = {},%        |
pdfkeywords = {},%
pdfcreator = {latex + hyperref}%
}

How can i wordwrap pdftitle's text or any other 
field?
i tried to use \\, \newline (according to latex 
syntax) and also \n, but none of them yields what 
i need.

Somebody can help me?

Thanks in advance.

-- 
Cordiali saluti,

Valter Violino

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