The Arctic Data Center is being migrated into a new environment these days. the migration will be finished before Summer. As part of the migration, the legacy interface available at http://arcticdata.met.no will be permanently closed (address to be redirected into this site). The harvesting interfaces have already been shut down and new harvesting interfaces are being implemented at https://adc.csw.met.no/. This is an pyCSW implementation supporting OGC CSW, OAI-PMH and OpenSearch. Currently the OAI-PMH interface is supporting GCMD DIF (v9.7) and ISO19115 (INSPIRE). Support for WMO Core Profile is in progress. Further documentation of the harvesting interface will be provided after completion of the system migration.