Digital preservation
ºìÌÒÊÓƵ is committed to the long-term preservation of the scholarly record. All journal content is preserved through the trusted third-party preservation services and , to ensure continued access in the event of technological change, human error, cyber-attacks, and organisational failure.
CLOCKSS and Portico are not-for-profit services committed to the long-term preservation of digital content, including e-journals, e-books, and retro-digitised historical collections. ºìÌÒÊÓƵ deposits article PDFs, figures, metadata and associated supplementary material with these preservation services.
Controlled Lots of Copies Keeps Stuff Safe (CLOCKSS)
CLOCKSS is a community-governed digital preservation service that brings together academic publishers and research libraries to ensure the long-term preservation of scholarly content. The archive is built on , originally developed at Stanford Libraries, which stores and validates multiple copies of content across a globally distributed network of archive nodes.
Content deposited in CLOCKSS is preserved within a secure "dark archive", meaning it is not publicly accessible under normal circumstances. However, if a trigger event occurs, for example, content becoming unavailable on the web due to a publisher ceasing operations, the CLOCKSS Board may authorise the release of the archived content. Once triggered, the content is made openly available under a Creative Commons licence, ensuring continued access for the scholarly community and the public.
CLOCKSS is governed by a board comprising representatives from both the publishing and library communities, who oversee policies and determine when trigger conditions have been met. This collaborative model helps ensure that scholarly content remains accessible for future generations should access to the original source ever be lost.
PORTICO
PORTICO is a digital preservation service launched in 2005, building on Electronic-Archiving Initiative established in 2002 with support from the Andrew W Mellon Foundation. Its mission is to preserve scholarly literature published in electronic form and ensure that it remains accessible to future generations of researchers, students and libraries.
Publishers deposit source files, such as XML and PDF content, directly with Portico. These files are converted into an archival format suitable for long-term preservation based on the NLM Archiving DTD and stored alongside the original source files. In addition to preserving content, Portico actively manages the archive by migrating material to new formats when necessary to help ensure continued usability as technologies and file formats evolve.
Portico also provides access to archived content when defined trigger conditions occur, helping to ensure the ongoing availability of the scholarly record.