I have the impression that you try to do something very, very specific for
the lifetime of this long thread, but you're not sharing your requirements
constructing weird 'suppose that..' scenarios instead.
People try to help you, answer all your requests so far, but from this
particular point of view I doubt that anyone _can_ help you, unless you're
sharing what you actually want to do. Without much hand waiving and
dropping weasel words like in "detect suspicious PDF files".
My humble opinion and all, of course.
Ben
On Thu, Mar 21, 2013 at 6:48 PM, adriano <asanton...@gmail.com> wrote:
> 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]
> <[hidden email] <http://user/SendEmail.jtp?type=node&node=4657874&i=0>>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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