The University of Illinois Library commits to preserving the intellectual content of Publishing Without Walls projects in perpetuity, according to current digital preservation best practices.
Historically, digital preservation has been most successful for content delivered in widely-used formats. We have every reason to believe this will continue to be true into the future. Projects that rely on platform customizations are more challenging to preserve. This is one reason PWW favors working with open source tools and with stable design templates.
The Library commits to preserving a usable version of all PWW projects. For projects with highly customized interactive presentations, the preservation strategy may include a combination of approaches, including the preservation of a simplified version of the publication alongside the underlying, raw machine-readable code for the complete project. This insures that future users, in a different computing environment, will still have the necessary source material to recreate the full interactive expression of the content through software emulation, etc.