PDF PDF Which is right and which is ... Was Re: PDP-11/24 CPU later version
pbirkel at gmail.com
Sun Feb 19 02:40:33 CST 2017
From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Chuck Guzis
Sent: Saturday, February 18, 2017 4:04 PM
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Re: PDF PDF Which is right and which is ... Was Re: PDP-11/24 CPU
On 02/18/2017 11:24 AM, COURYHOUSE at aol.com wrote:
> Adobe claims " PDF/A - the ISO standard for long-term archiving"
> -I am confused about all the versions etc..
> -which are good which are bad?
> -are there good programs for opening hesitant to open pdf file?
> - what is a good freeware PDF generator? / modifier?
> - are older versions of the reader better than the newer ones?
> -my HP scanner software makes PDF files eiher as graphics or as graphics
> -is my HP scanner making "good" pdf files that can be read into the
> Sorry if I seem confused on this... but I am!
When scanning documents and converting to PDF, I've found that
ghostscript works fine (under Linux). There's also a separate tiff to
pdf converter available as a package. Some people use ImageMagick
There are also a number of free online conversion websites; I've used a
couple and they seem to be pretty decent.
etween-pdf-and-pdf-a/ is a concise description
- PDF/A is a special type of PDF meant for archiving documents
- PDF/A does not allow audio, video, and executable content while PDF does
- PDF/A requires that graphics and fonts be embedded into the file while
PDF does not
- PDF/A does not allow external references while PDF does
- PDF/A does not allow encryption while PDF does
Those are all good archival properties! However, it's also R/O.
For my purposes PDF/A is undesirable because I can't: (1) OCR it. (2)
Extract pages. (3) Combine sectioned files into a single document. (4)
Rotate pages permanently.
It's the R/O part that is "mighty unhelpful" since it precludes basic
document management. Gotta hope that the archivist made good choices. But
the choices of an archivist aren't necessarily those of a user with a
day-to-day need to fix stuff :-<.
I can see value for a processing stream that uses a PDF/A intermediary to
ensure the desirable properties listed above (e.g., font embedding) but then
a final save in standard "open" PDF that allow users to accomplish the types
of manipulations that I've listed.
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