PREMIS (Preservation Metadata, Data Dictionary Maintenance Activity)
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PREMIS Data Dictionary for Preservation Metadata, Version 3.0

The PREMIS Data Dictionary and its supporting documentation is a comprehensive, practical resource for implementing preservation metadata in digital archiving systems. The Data Dictionary is built on a data model that defines four entities: Objects, Events, Rights, and Agents. Each semantic unit defined in the Data Dictionary is a property of one of the entities in the data model.