Biodiversity Information Standards (TDWG), originally called the Taxonomic Databases Working Group, is a non-profit scientific and educational association that works to develop open standards for the exchange of biodiversity data, facilitating biodiversity informatics. It is affiliated with the International Union of Biological Sciences. It is best known for the Darwin Core standard for exchanging biodiversity, which has been used by the Global Biodiversity Information Facility to collect millions of biological observations from museums and other organizations from around the world.