SWEET-REGISTRY is a multi center, investigator initiated registry in patients with diabetes. SWEET' is an acronym derived from 'Better control in Pediatric and Adolescent diabeteS: Working to crEate CEnTers of Reference'. Having the vision of equal quality care for all children with diabetes the mission of SWEET is to harmonize care to optimize outcomes of children with diabetes worldwide. Initiated with support of the EU Public Health Program in 2008 the SWEET group has over 10 years of experience in creating and sustaining a high quality professional network based on agreed standards of care, criteria for certification, international guidelines and quality control. While originally focusing on the European region, SWEET is currently expanding and has received increasingly global attention, with centers across different continents including Asia, Africa, North and South-America. SWEET extracts wherever possible the data from existing data collection sources and following longitudinally unselected clinical populations of all pediatric diabetes patients as an ongoing measure of benchmarking and a quality control cycle as well as a resource for scientific studies and collaborative research. The SWEET registry was approved by the ethical committee of Hannover Medical School and is associated with the AUF DER BULT Diabetes Centre for Children and Adolescents, Hannover, Germany, which coordinates the SWEET collaboration. Each center has to meet specific entry criteria showing diabetes expertise and compliance with the International Society for Pediatric and Adolescent Diabetes (ISPAD) clinical practice guidelines. The local institutional review boards of the participating centers approved the pseudonymized data collection.