Heiðrún (a.k.a. Heidrun) is DPLA's new metadata aggregation system, which we use to harvest metadata from Hubs, map it to the DPLA Metadata Application Profile, enrich it to clean up and add value, and to index it for use in the DPLA Platform API. Heiðrún is implemented as a Ruby on Rails application that builds on Krikri, a Ruby gem for metadata harvesting, mapping, and enrichment.
External Links
Lorenz Frølich, "Heiðrún"
from Karl Gjellerup's Den ældre Eddas Gudesange