Metrics for Repository Assessment
Digital repositories are emerging to meet the needs of scholars and researchers who rely heavily upon digital data and content in their research. Maintaining digital resources over time is necessary to permit longitudinal or time lapse studies, and to preserve researchers' ability to support, and others to evaluate, their findings. There is a need for “long-lived” collections of digital content and data. Some repositories specialize in data for particular fields or disciplines. Others aggregate digital content on a variety of subjects.
Various assessment criteria have been created for evaluating digital repositories. These tools can help libraries, scholars, publishers, and others to judge the reliability of the repositories and digital preservation services they may choose to rely upon or support. Of the assessment tools available, the most important for CRL's community are the Trusted Repository Audit Checklist (TRAC) and The Trusted Digital Repository Checklist (TDR) or ISO 16363.
TRAC contains metrics that help in judging the repository in the areas of Administration and Policy, Object Handling and Technology. It was published by CRL in 2007. To read more about the TRAC criteria, please access the TRAC webpage here.
ISO 16363, or TDR, as it is more commonly referred to, is an ISO standard as of February of 2012. It is a revision of the TRAC Checklist. Many of the changes were structural, and it continues to address the same core areas. For more information about ISO 16363, please access our TDR page webpage here.
CRL provides access to other tools for evaluating digital repositories on the page entitled Other Metrics.