Yes, using embedded files is EXACTLY the right way to achieve what  
you want.

Leonard

On Mar 15, 2008, at 11:30 PM, [EMAIL PROTECTED] wrote:

> Hi all,
>
> I have a requirement to generate pdf files and be able to compare  
> the files afterwards.  For example, I would first generate  
> Version1.pdf and later on generate Version2.pdf which could have  
> some extra data.  I know I could easily compare the raw data so I  
> was wondering if there is a way to embed the raw data to the pdf  
> files in a way that it's hidden and users cannot view the raw data  
> but my Pdf compare program would be able to extract the raw data  
> from the pdf files and compare the two.  Example below:
>
> File 1 Raw Data Pipe Delimited
> First Name|Last Name|Address          <--Want to embed this raw  
> data text file hidden in Version1.pdf
> A|B|C
> D|E|F
> G|H|I
>
> File 2 Raw Data Pipe Delimited
> First Name|Last Name|Address           <--Want to embed this raw  
> data text file hidden in Version2.pdf
> A|B|C
> D|E|F
> G|H|I
> J|K|L
>
> My Pdf Compare Program would then extract these two text files from  
> the PDFs and determine that File 2 has an extra record "J|K|L".   
> I'm just looking for some direction on the best approach to do  
> this.  I did some searching and found some information on  
> PdfFileSpecification.fileEmbedded but wasn't sure if this is the  
> right method to be using since it seems this would leave the raw  
> data text file visible to someone when they open the PDF files.
>
> Thanks in advance,
> Dave
>
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