Meaning of deleted objects and generation number for a pdf consu

Message-ID:<ed366900-028a-44a6-906e-1ac8411c8edd@j38g2000yqa.googlegroups.com>
Subject:

Meaning of deleted objects and generation number for a pdf consumer

Date:Tue, 10 Feb 2009 22:15:05 +0100


Hi all,
It seems that the deleted objects and generation number of any objects
have no meaning for a programm which only reads the pdf file (a pdf
consumer), for a deleted object won't be used by the document anymore,
and the object whose position appears in the most recent xref table is
the valid one, regardless of its generation number. Is this
understanding correct? Many thanks

king

Message-ID:<MPG.23fc9441a17cf6b898972f@usenet.plus.net>
Subject:

Re: Meaning of deleted objects and generation number for a pdf consumer

Date:Wed, 11 Feb 2009 08:53:09 +0100


In article <ed366900-028a-44a6-906e-
1ac8411c8edd@j38g2000yqa.googlegroups.com>, king_wwang@yahoo.de says...

> It seems that the deleted objects and generation number of any objects
> have no meaning for a programm which only reads the pdf file (a pdf
> consumer), 

[snip]

> the valid one, regardless of its generation number. Is this
> understanding correct? 

Yes, these remain behind in order to allow the possibility of undoing 
changes to a document. If you aren't interested in that then you can 
ignore delted objects.


			Ken