Signs of the Times - May 2014 - (Page 14)
Te c h no lo gy U p date
By Darek Johnson
Lawsuit? Cover Your Assets
with PDF/A
Darek Johnson
is ST's Senior
Technology Editor/
Analyst. Email him
at darek.johnson@
stmediagroup.com
Adobe's long-term, digital-archiving standards should
hold up in court.
Adaptive leaders must first be selfaware - then have the additional
ability to recognize change in their
operating environment, identify
those changes, and learn how
to adapt to succeed in their new
environment.
- U.S. Army Urban Warfare
Manual
D
uring my 12 or so years of
military experience, I learned some
valuable lessons, and not all were
in field manuals. The first, "Don't
stand in front of a loaded gun,"
has proven invaluable. Other, nontextual learning regarded essential
life rules: eat whenever possible;
sleep whenever possible; safeguard
your dry socks; volunteer only when
coerced, and trust your buddies to
look out for you. A most important
lesson - "CYA" - applies to all
lifestyles.
In today's electronic-snitch world,
we know that almost everything
we say or do is recorded, but this
isn't always the bad news. In some
cases, electronic records might
help you cover your ... uh, prove
your innocence. Not always, however, because skilled malcontents
can modify most electronic documents, and this possibility says
most (but not all) electronic files
aren't suitable as courtroom
evidence.
Proof positive
Suppose your shop is subpoenaed
for a sign-collapse lawsuit, one
that relates to a job that originally
received a licensed engineer's
approval. The lawsuit says you
didn't properly engineer the sign.
Suppose the sign-off engineer has
since moved to an Ecuadorian
mountaintop. Then, you discover
14 SIGNS OF THE TIMES May 2014
you've lost the original, stamped
papers, but, luckily, have retained
the original .DWG file. Imagine
happily uploading the file, to then
learn the engineer's stamp and
certification didn't carry over to
your saved file. Unknown to you,
it was in a gypsy format and, somehow, not saved with the document.
Your proof of innocence is simply
not there.
A Save format is merely a series
of trigger functions (codes and
numbers), and, under certain conditions, one or more functions may
not accept a code, font or auxiliaryfile format, so it, the Save format,
may either substitute another
character, font or image, or, worse,
decline to save that segment of the
file or document.
It simply vanishes.
Like the last cookie on a plate,
just as a six-year-old passes by.
Old-school Postscript™
Adobe® Postscript (PS) is a printing
and imaging standard that's licensed
to original-equipment manufacturers
(OEMs) for printing systems and
print-workflow results. Its upgrade,
Encapsulated PostScript® (EPS), a
standard, graphics-file format for
exchanging images, drawings, layouts or complete pages, contains a
file's object or layout description
and can include both bitmap and
vector data. In theory, it should
record everything on the document
or drawing, at the time saved, with
some exceptions.
Generally, Adobe Illustrator is
the tool used to create and save
.EPS files; Photoshop will save
bitmapped images as .EPS files.
However, Adobe says, if the file
contains data Illustrator doesn't
recognize, that some data loss
may occur.
Meaning, some (unrecognized)
information may be absent.
The lost-cookie syndrome, again.
Adobe says millions of users
work with PostScript® and Encapsulated Post Script, but also say it's
an outdated file format, one that's
trailing the firm's portable document
format (PDF).
Adobe PDF
The Intl. Organization for Standardization (ISO) maintains PDF, an open
standard for electronic-document
exchanges. Once converted to a PDF
format, such saved documents, forms,
graphics and web pages appear on
screen as if printed. They can also
contain clickable links, form fields,
video, audio and other processes.
You access a shared PDF file via
Adobe Reader® software or Adobe's
mobile-reader app.
The conventional PDF format
combines three technologies: PostScript's page-description, programlanguage subset (for generating
the layout and graphics); its fontembedding/replacement package
(which allows fonts to travel with
the document), and a structured,
storage system that bundles the
file elements and any associated
content.
Adobe's PDF/A format
Briefly, PDF/A, an archive subset
of PDF, is the Adobe standard for
long-term, digital archiving of "any
electronic document that can be
printed, or non-electronic documents
that can be scanned [and then
saved or printed]."
Embedded in the file is all the
relevant information - text, raster
images, vector graphics, fonts (ones
legally embeddable for unlimited,
universal rendering), color information, digital signatures and
Table of Contents for the Digital Edition of Signs of the Times - May 2014
Signs of the Times - May 2014
Columns & Departments
Features
St Update
Technology Update
Typography Foe Wide-Format Design
Vinyl Apps
Strictly Commercial
Lighting Techniques
The Moving Message
Technology Review: The Mutoh ValueJet 1617H printer
Technology Review: CorelDRAW Graphics Suite X7
Design Matters
New Products
Advertising Index
Editorially Speaking
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