Last night, I had the opportunity to participate in the first #libchat, a Twitter chat for people in the library field. There were several intriguing questions, including this one:
How can libraries store and preserve digital works over the long term?
Blefurgy summed it up best: “No simple way for this yet; best option is to keep multiple copies and actively mange content to make sure it remains accessible”
Digital preservation is not a simple, one-shot deal. The “benign neglect” strategy that tends to work well for paper-based materials is simply not an option for digital resources. Digital preservation is a continuing process of refreshing media, converting formats, migrating files — all while trying to keep the file and its metadata intact.
Digital resources present a host of preservation challenges. You need to be concerned about the media. Is it stable? Is the media itself still accessible? (Do you still have an 8-track player for those tapes you still have in the back of the closet?) On top of that, you need to be concerned about the accessibility of the data. Is it in a format that can still be read? This includes not only the file format itself, but also the version. (How many versions back can the current software read?)
This continual process of preservation isn’t something we’re accustomed to. We’re used to stabilizing the paper, putting it someplace safe, and calling it a day (or century). So it is very tempting to look at higher-maintenance digital resources with a bit of distain. “We have scrolls that are over 2,000 years old. No digital file is going to do that.” Take that line of thought a step further and you can end up wanting to convert digital materials to paper.
A digital-to-analog conversion is a far-from-perfect solution. First, not all digital materials are suitable or even usable in hard-copy. Obviously, sound files can’t be converted to paper, but even something that is strictly data isn’t always suitable for analog. Relational databases, for example, would be difficult or impossible to make usable in paper form. Second, a conversion to paper results in the loss of embedded metadata. Even if you extract it, the effort to somehow connect it to the data would be incredibly labor intensive. Third is the issue of space. Do you really want to print out and store several thousand photos or a dataset with a few million records?
With paper not being a viable solution, we’re back to the lamentation that no digital file lasts as long as paper. “There’s no file that will last forever.” That’s true (at least to the extent of our development of digital resources.) But that doesn’t matter.
The files we have now don’t need to last forever. We just need to preserve them for the next generation, so they, in turn can preserve them for the generation after that.
It’s akin to the solution of how to eat an elephant. (Answer: One bite at a time). If we keep fretting about a lack of a forever-lasting file format, we can end up dismissing or discounting the things we can do.
We don’t need to have the magic file format that will keep that file complete and accessible from now until the end of time. We need to take responsibility for our files for our lifetime and keep them in good condition so that the next generation can continue their preservation for the generation that follows. By seeing the longevity of digital resources as being a process, we can concentrate our efforts on being responsible stewards.