Nomenklatura is a reference data recon server. It is a service that allows users to define and manage manage lists of canonical entities (e.g. person or organization names) and aliases that connect to one of the canonical entities. This helps to clean up messy data in which a single entity may be referred to by many names.It includes a user interface, an API, and a reconciliation endpoint for OpenRefine for matching data from data sets with the canonical entries.

By submitting data to Nomenklatura, users agree to license it under the terms of the Open Database License.