On 9/1/06 1:43 PM, "SteveJ1" <stevej1

mac.com> wrote:
>> <<We have been successful in using WordPerfect 3.5 under OS 9.2 to open the
>> MacWrite files directly and save them to rtf format, and then using
>> Microsoft Word to open and save them as standard Word 98 and 2004 Mac files
>> for use in OS X. So far, most file formatting has remained intact. This is
>> a slow and tedious process, but it does work.>>
> This whole quandary is an interesting illustration of the myth that digital
> preservation is the panacea for preserving documents, isn't it?
I've never heard of digital preservation called a panacea but it this does
illustrate that the problems and practice of digital preservation are very
different than those of physical objects.
> This is where
> the whole concept of the "paperless society" fails.
I've seen "paperless office" more often than "paperless society" and most of
what that refers to is the kind of stuff you don't want to preserve for the
grandkids (memos, phone directories, etc.) In the home, it would refer to
things like online bank statements and bill paying. Historians may miss such
ephemera but most families wouldn't consider it a part of their legacy.
> With the new generation of
> Macintels, even the WordPerfect solution will no longer work, since it isn't
> possible to run OS 9.2 and thus WordPerfect on the new Macs. And this is only
> at most 20 years later.
Yes, 20 years in many cases is too long to wait between file format
conversions. It would have been easier to find the tools to do such
conversions in 2000 than today.
> Imagine 100 years from now, our
> great-great-grandchildren want to look at the old family photos and letters.
> They know there are documents on those weird old shiny "DVDs" (or worse, on
> those plastic things with the metal sliders). But...how the heck do they
> access them? First they have to find some sort of antique device that can read
> them. Then they have to find some kind of antique computer that can attach to
> that device using...what's it called?..."firewire".
Digital preservation requires a process of regularly moving to newer
physical media. This is not just because of deterioration but also
obsolescence. Fortunately doing this for digital media is much easier than
for analog. Over time, storage capacities and speed go up while costs go
down while the quality stays the same. But you can't wait too long between
transfers and with large archives it could be essentially a continual
process.
> Then if they've managed to
> dig up such devices, they have to figure out how to access the files. "It's
> written here on the disc that the documents are all 'png' and 'pdf' in 'sit
> archives'...what the heck does that mean?"
Today's popular, documented standards like PNG and PDF probably won't be in
common use for decades but there's a good chance they'll be accessible.
StuffIt's compression format probably won't fare as well.
In any case, as with the physical media of a digital archive, the file
formats must be regularly reviewed and converted in a timely fashion. This
actually a trickier problem because different file formats have different
strengths and weaknesses. Even the best word processor conversion ever
available for MacWrite files might result in documents with slightly
different margins, spacing and the like. So to preserve the layout, you
either need to convert to an image format like TIFF or a layout format like
PDF and accept their downsides.
> If the photos and family writings were in photo albums and files, or even
> (unlikely but possible) preserved in microform, they'd probably be badly
> faded, but otherwise immediately accessible.
My understanding is a lot of photos probably won't survive 100 years. There
have been many different processes, chemicals, and papers used over the
years and some don't hold up well over time.
Silver halide on polyester microfilm is incredibly stable, it's expected to
survive 1000 under reasonable environmental conditions. Unless there it was
left out in the sun to bake, it would essentially unchanged 100 years later.
But it's also not in color and while you may be able to view microfilm with
a magnifying glass in a pinch, you'll need access to an expensive, slow and
cumbersome device to print or otherwise transfer it to another medium not to
mention how to get the material on microfilm in the first place. If storing
materials on microfilm had mass appeal, there would be market incentives to
make meeting these needs affordable but that's unlikely to happen.
> And where digital technology
> actually does do some magic is that those old faded photos and letters could
> no doubt be scanned and edited and then printed again in (at least close to)
> their original quality.
The programs can make some educated guesses but they're not really restoring
the content of that physical object.
> But, this is a good cautionary tale about putting all
> our eggs in the digital-preservation basket. Be careful about thinking "I can
> scan it and then throw it away!"
True. I don't think digital preservation, in a sense that is likely to have
the content survive for the periods we're talking about, is an activity for
most households today.