- Digital Preservation
Digital preservation is the series of management policies and activities necessary to ensure the enduring usability, authenticity, discoverability and accessibility of content over the very long term. The key goals of digital preservation include:
- usability – the intellectual content of the item must remain usable via the delivery mechanism of current technology
- authenticity – the provenance of the content must be proven and the content an authentic replica of the original
- discoverability – the content must have logical bibliographic metadata so that the content can be found by end users through time
- accessibility – the content must be available for use to the appropriate community
- Electronic Scholarly Journals
Electronic scholarly journals are peer-reviewed journals that may be published in electronic form only or may have both print and electronic editions.
Portico’s primary preservation methodology is migration, which involves transitioning content from one file format to another as technology evolves and file formats become obsolete. Two other common preservation strategies include emulation, which involves strategies to make future technology mimic technology of earlier generations, and byte preservation, which involves simple storage of an unmodified stream of digital bytes without special provision for future display or functionality.
- Perpetual Access or Post-cancellation Access
Both publishers and libraries have recognized that in some cases, even after a library has terminated a license to an electronic resource, it may be necessary for that library to continue to have ongoing access, which is commonly known as perpetual access or post-cancellation access. A publisher may choose to extend perpetual access to a library under terms that the library finds acceptable, and that access can be provided through the Portico archive if the publisher desires.
- Source Files
Publishers submit to Portico source files, which are electronic files containing graphics, text, or other material that comprise an electronic journal article, issue, or volume. Source files may differ from files presented online most typically by including more information or higher quality graphics.
- Trigger Event
Campus-wide access to archived content will be granted to libraries supporting Portico when specific conditions are met that cause titles to no longer be available from the publisher or any other source.
These specific conditions are often called trigger events and include:
- A publisher stops operations, or
- A publisher ceases to publish a title, or
- A publisher no longer offers back issues, or
- Upon catastrophic and sustained failure of a publisher’s delivery platform.
For more information about the titles that have been triggered by Portico please see Trigger Events.