Information describing items in the repository
- Anyone may access the metadata free of charge.
- The metadata may be re-used in any medium without prior permission for not-for-profit purposes provided the OAI Identifier or a link to the original metadata record is given.
- The metadata must not be re-used in any medium for commercial purposes without formal permission
 Open Access Intiative format that provides a persistent way of identifying the metadata of a record in order for it to be gathered/harvested by other websites