"Wikidata is a free linked database that can be read and edited by both humans and machines. Wikidata acts as central storage for the structured data of its Wikimedia sister projects including Wikipedia, Wikivoyage, Wikisource, and others. Wikidata also provides support to many other sites and services beyond just Wikimedia projects! The content of Wikidata is available under a free license, exported using standard formats, and can be interlinked to other open data sets on the linked data web."

United Nations Office for Disaster Risk Reduction Terminology

"The UNISDR Terminology aims to promote a common understanding and usage of disaster risk reduction concepts and to assist the disaster risk reduction efforts of authorities, practitioners and the public. The previous version 'Terminology: Basic terms of disaster risk reduction' was published in 'Living with risk: a global review of disaster risk reduction initiatives' in 2004.

International Classification of Primary Care

"ICPC (International Classification of Primary Care) is a clinical coding system. The first version of ICPC published in 1987 is referred to as ICPC-1. The version in the 1993 publication “The International Classification of Primary Care in the European Community: With a Multi-Language Layer” is known as ICPC-1. The second version from 1998 is referred to as ICPC-2. ICPC-2e is an electronic version from year 2000 of the revised and corrected chapters 10 and 11 of the ICPC-2 book.

Human Rights Information and Documentation Systems Micro-Thesauri

"A collection of 48 lists with terminology. The Micro-thesauri are intended for use in conjunction with HURIDOCS Standard Formats manuals, and in particular with the HURIDOCS Events Standard Formats: a tool for documenting human rights violations. The Micro-thesauri can be used as a starting point for developing one’s own index terms for libraries and documentation centres, as keywords for organising information on websites, or as controlled vocabularies for databases to record violations."