From Silos to Opaquenamespace: Oregon Digital’s Migration to Linked Open Data in Hydra

Abstract

The University of Oregon and Oregon State University migrated their joint digital collections, Oregon Digital, in 2013–2015. During the migration, massive data normalization was undertaken for over 300,000 digital items, and Linked Open Data (LOD) was integrated into metadata records. Metadata schema were abandoned in favor of a consolidated but diversely sourced set of LOD predicates. Local vocabularies were codified and published as LOD in the Oregon Digital triple store Opaquenamespace. This paper documents the accomplishments and challenges of the process.