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The General Data Protection Regulation (GDPR) came into force on 25th May 2018 and provides data protection and privacy rights to citizens of the European Union. For more information about the UDC Consortium and the GDPR, please read our updated privacy policy.

Dear UDC users, we wish you all a Merry Christmas and a successful and prosperous New year

This is information to UDC Summary users who have noticed that udcsummary.info is currently not available with the message "This domain registration expired on 09/15/2017". Please note that this is due to an error on the part of our hosting provider and ongoing issues with their automatic domain renewal service. We are told that it may take up to 24 hours to resolve this. The UDC Summary will be back again as soon as this is resolved.

The International UDC Seminar 2017 "Faceted Classification Today: Theory, Technology and End Users" will take place in London on 14-15 September 2017 at Wellcome Collection. Do not miss your early bird registration discount!