Strategies for Digital Library Migration

Abstract

A migration of the datastore and data model for Stanford Digital Repository’s digital object metadata was recently completed. This paper describes the motivations for this work and some of the strategies used to accomplish the migration. Strategies include: adopting a validatable data model, abstracting the datastore behind an API, separating concerns, testing metadata mappings against real digital objects, using reports to understand the data, templating unit tests, performing a rolling migration, and incorporating the migration into ongoing project work. These strategies may be useful to other repository or digital library application migrations.