Ok, then suppose the incoming PDF document includes a stream object
containing text that would cause trouble to the recipient if it only was
visible, but it is not because it is not referenced in any page that the
document is officially comprised of, according to the "effective" document
Catalog. This document might even contain an extra Catalog that would cause
the invisible text to become visible, if it only was in effect, but is not
because it is located in an area of the PDF file that is also ignored.
Again, I would rise my eyebrow if I noticed something like that "by hand",
and still more I would like to detect such a situation if I was processing
a PDF document in an unattended way.
I perfectly understand that by processing the PDF document in a
*standard*way that extra objects would just be ignored.
I just would like to detect such situations -- of course by processing the
PDF in a non-standard way.
I also understand from your comments that you consider my arguments just
nonsense, okay.
I just tried to ask....
On Wed, Mar 13, 2013 at 3:49 PM, Leonard Rosenthol-3 [via iText - General] <
ml-node+s2136553n4657816...@n4.nabble.com> wrote:
> On 3/13/13 3:12 PM, "adriano" <[hidden
> email]<http://user/SendEmail.jtp?type=node&node=4657816&i=0>>
> wrote:
>
> >Now, mkl, suppose you have to "process" the incoming PDF document as a
> >whole, without altering it in any way....
>
> Yes and no.
>
> The process by which one processes a PDF document, where one starts with
> the trailer->root/Catalog->Š, would mean that any objects that are NOT
> referenced in the current xref table OR that are not linked into the
> object tree, will be ignored.
>
>
> Leonard
>
>
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