[NTG-context] ConTeXt tool for enabling comments in PDF ?

[Vit Zyka]

h h extern wrote:
> Vit Zyka wrote:
> 
>> So, to do that, pdfTeX should start to calc document diggest and there 
>> should be standard(?) process of signing this value.
> 
> how is that one calculated, imagine that in the %! fields you fill in 
> placeholders like hereshouldgosomemagiccode, then one can run a script 
> over the pdf, calculate that magic, and replace the string; maybe this 
> can be hooked into  xpdflib
> 
> Hans

Yes, I agree, postprocessing is possible. But I did not find any digest 
computing alg in the range of C/C++ or Perl. Also do not known links to 
xpdflib.

Vit Zyka