Re: [NTG-pdftex] Incomplete CharSet causes failure with PDF/A validation

29 Jan 2019

      On 1/28/2019 7:59 PM, Ross Moore wrote:
...
Hi Phil,
On 28/01/2019, at 22:44, "Taylor, P" mailto:P.Taylor@rhul.ac.uk> wrote:
...
Hans Hagen wrote:
...
...
All I can say is that since using AADC, editing PDFs has become a 
real pleasure.
instead of fixing the source? (i'd probably opt for html then)
I /have /no source; I have a PDF, originated by a third party, which I 
need to amend (e.g., to illustrate what /can/ be achieved or what is 
desired).  I have done this with wine lists, advertisements, posters, 
etc., sent them back to the originator, and he or she has then been 
able to incorporate the requested amendments in the original 
(Photoshop / InDesign / Illustrator / etc.) source.
...
but ... given this thread: we're talking of archiving and editing a 
scientific archived article is imo "not done'
Why is it about *just* that?
It is about adjusting pdfTeX to be able to produce PDFs that are useable 
in a variety of modern contexts. Editability is one of those aspects.
the "just" applies to the archiving: render a document, make sure it's 
ok, and put it in an archive where it's not touched (if it's a real 
archive)
...
As a lecturer and academic, I use (La)TeX for a wide variety of document 
types.
Why should I need to use completely different software applications for 
class materials, lecture notes, student tests, examinations, performance 
reports, grant applications, conference reports, special demonstrations, 
and much more?
Well, this is indeed why editing pdf is not an issue is it? You use tex 
so you edit your source! This means that pdftex only has to create a 
valid pdf and not worry about it being edited.
...
The answer is that I do not have to with TeX, provided it allows to do 
all the special things in a reasonably consistent way, and all can exist 
compatibly within a PDF file.
A feature that is obviously useful in one context could be useful also 
for other types of document.
Sure but editible means embedding whole fonts and such.
...
...
Fine, that is a very different matter.
No, it is not.
Everything that Philip has said that he does with PDFs is very 
appropriate for this discussion.
He edits forms! That is widgets! And widgets are not typeset (well kind 
of pseudo typeset) ... just strings and choices wrapped in annotations. 
If one can edit and tweak them, fine, but here we're talkin gof text 
streams generated with a tex program (with all things fonts involved).
...
Essentially we need to keep TeX relevant to document production in the 
current age, and into the future.
It has been relevant for a few decades and will probably survide a few 
more. No one knows what happens from then on. If advanced html rendering 
had been around two decades ago, would tex be where it is now (not even 
pdf would be around i guess).
...
...
...
and ... for texies, if then make a pdf, they do have a source, so 
they can fix the source and regenerate the pdf (which also keeps them 
in sync)
Even when working collaboratively, you do not always have the full source.
I frequently use APro to add hyperlinks and logos into otherwise 
sterile-looking PDFs produced with TeX by others, before making the
...
resulting PDF available, linked from public pages of a website.
Hm, so archiving got a new meaning. I wonder how that works on the long 
run in academia: patching documents, maybe even presented results. Does
Hm, that is worrying ... that you have to mess with the pdf instead of 
reprocessing ... so tex is not that portable. But anyway, aghain we're 
not really talkling about editing content here: a logo is an image (no 
document fonts involved) and making a url active is applying an 
annotyation which again involves no document fonts. So, these don't 
relate to embedding fonts and charsets and ... which is what this thread 
is about.

(btw, i'd rather ot bet tex's future on some commercial programs: just 
see what happens with media etc in pdf ... pretty much a waste of time 
to spend tex related dev time on that (in retrospect))

that also invalidate a reference to it?

Hans

-----------------------------------------------------------------
                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
        tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
-----------------------------------------------------------------