no-email said:
Pdf is not a free format, it is proprietary, owned by Adobe.
PDF is a _specification_ which Adobe originated. It's since been submitted to
ISO for a couple of different purposes --- PDF/X is one which is coming along
nicely. While Adobe is a member of the committee for pdf/x, they've been
over-ruled on a number of points and can't be said to own or control the
process / specification.
Pdf:s cannot be changed to suit the viewers preferences, like html can.
One can however set a .pdf viewer to show .pdfs in a number of different ways
which suit many different uses. If you've a preference which isn't supported
have you looked at the source code to xpdf or suggested that change?
Pdf is not an information storage file format, it is rather the opposite,
it presents the information exactly as the author has composed it, the
viewer has basically no rights.
Actually, rights can be set within the .pdf to allow different things (or
disallow them). Moreover, the newer versions allow ``tagged'' .pdfs which
provide for different presentations on different devices / screens.
It is a format for control freaks, who want to decide exactly how others
are to view the information, and not use it in any other way than just view
it.
Or print it, or search it, or load it onto a Palm Pilot or Pocket PC to read
later, or use the .pdf as a calculator, or front-end to a database, or as a
math quizzing program. The acrotex web site has a lot of nifty examples.
Making a pdf is like arranging a number of printed texts and pictures in a
certain way, then put a thick armored glass above it and make a box out of
armored concrete around it.
So the viewer can only watch the information through the glass, he cannot
access the information or decide for himself how to arrange the text and
pictures.
Using tools like pdfpages, one can arrange an (unprotected) .pdf any way one
might wish. There're also tools like Adobe Illustrator or Macromedia FreeHand
which parse a .pdf more readily than a .eps in many instances, and of course
programs like Adobe PhotoShop which can RIP a .pdf to allow arbitrary usage.
Cenon,
http://www.cenon.info is a NeXTstep program making the transition for
free opensource and it can do quite a lot of things with .pdfs --- runs in
Linux using GNUstep, Mac OS X or OpenStep 4.2, possibly in Windows if the
mgstep libraries will support it.
I feel sad when I see all these fools show up here, asking for programs to
create pdf:s with.
There're lots of them, many are free.
A few years later they show up again, asking for ways to break into pdf:s,
ways to access the information they, or somebody else, has locked into a
pdf.
Well, it's rather a bad idea to lose the source to one's document --- it's now
possible to embed said source in a .pdf and send it along though (but I'm not
sure if there're any free programs for doing that). At one point in time, I was
experimenting w/ embedding non-visible tags in a .pdf to allow a document's
reconstruction --- actually used that to get a couple of books out of Quark and
into .rtf.
Cracking open a .pdf which someone else made is of course reprehensible. The
xpdf site has a nice comment on that.
Boycott the pdf file format!
And your suggestion for an alternative able to do anything which it can is
what?
Take a look at my portfolio,
http://members.aol.com/willadams and let me know
what document format could be used instead for the .pdfs there.
SVG is the most promising, but the viewer isn't particularly widespread, and I
want to support NeXT/OPENstep systems, both for sentimental reasons and because
I occasionally work on my web site from my NeXT Cube (there are .pdf viewers
for NeXTstep)
William