OpenDOAR Repositories and Metadata Practices
"In spring 2014, authors from the University of Missouri conducted a nation-wide survey on metadata practices among United States-based OpenDOAR repositories. Examining the repository systems and current practices of metadata in these repositories, researchers collected and analyzed the responses of 23 repositories. Results from this survey include information about the creators of metadata, best practices and resources, and controlled vocabularies. Findings will inform libraries about the current state of repository and metadata choices in open repositories in the United States, especially as they pertain to overarching questions of interoperability."