Digital preservation policy

All files are committed to Portico for preservation. Portico provides access to its library participants when specific conditions or "trigger events" occur, which cause journal titles to no longer be available from the publisher or any other source:

• When a publisher ceases operations and titles are no longer available from any other source.
• When a publisher ceases to publish and offer a title, and it is not offered by another publisher or entity.
• When back issues are removed from a publisher's offering and are not available elsewhere.
• Upon catastrophic failure by a publisher's delivery platform for a sustained period of time

When e-journal titles have "triggered," they are available to all participants in the Portico E-Journal Preservation Service, regardless of whether the participating institution has previously licensed the content. Also, all versions of the papers (preprints, postprints and published versions) are stored in the publishing house's archive.