Re: [iText-questions] Merging PDF/A documents to output also PDF/A

[Leonard Rosenthol]

Title: Re: [iText-questions] Merging PDF/A documents to output al

At 10:38 AM +0100 11/9/06, Beck Julien wrote:

I'm currently performing some evolutions on an archiving solution for a customer. It handled PDF files, but has now to handle PDF/A files.

        Wonderful!  The more PDF/A support in teh world the better..

Sometimes, files have to be merged together.

        Oh boy!

I'm currently trying to merge several PDF files into one unique file. The input PDF files are thus now in the PDF/A (archive) format and the output file has also to be in the same format. But the output is currently just PDF and not PDF/A.

 

        That's not your biggest problem :(.

        There is an entire section in the forthcoming PDF/A application notes which discusses the problems and concerns when merging PDF/A documents together into a new PDF/A-compliant PDF.   These includes, but are no limited to

1) color management when the OutputIntents don't match

2) merging of metadata

3) handling of combinations of A-1a & A-1b

4) Inclusion of appropriate audit trail in PDF/A-1a

I'm using iTextSharp, but this shouldn't make a difference, should it ?

        Sure it should.

        First and foremost, iText(Sharp) doesn't currently support creation of PDF/A compliant documents.  So that would be first roadblock to your work.

        Then, you'd need to concern yourself with the items listed above (and others) that are outside the general purview of iText(Sharp) but are concerns of PDF/A!

To check PDF/A conformance, I use the "PDF Checker" program from Seal System.

        I would recommend that you use the PDF/A preflight selection in Adobe Acrobat 8 OR PDF Appraiser from Apago.  Both do a MUCH better job than Seal's!

Leonard

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Leonard Rosenthol                            <mailto:[EMAIL PROTECTED]>
Chief Technical Officer                      <http://www.pdfsages.com>
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