The Library of Congress’ Network Development and MARC Standards Office unit has released Implementing the PREMIS Data Dictionary: A Survey of Approaches.
Here is an excerpt from the report’s preface:
The Preservation Metadata: Implementation Strategies (PREMIS) Working Group developed the Data Dictionary for Preservation Metadata, which is a specification containing a set of "core" preservation metadata elements that has broad applicability within the digital preservation community. The PREMIS Data Dictionary (PDD) was released in May 2005 along with a set of XML schemas to support its implementation. Since that time, institutions have begun to implement preservation metadata by providing content for semantic units expressed in the data dictionary or comparing it with planned or existing systems for long-term preservation. . . .
The Library of Congress, as part of the PREMIS maintenance activity, commissioned Deborah Woodyard-Robinson to provide this study to explore how institutions have implemented the PREMIS semantic units. . . . In this study sixteen repositories have been surveyed about their interpretation and application of the PDD, with an analysis then made on how the PREMIS core fits with the functions of a preservation repository and which PDD semantic units will be most relevant to certain types of repositories.