GBIF Backbone Taxonomy
The GBIF Backbone Taxonomy, often called the Nub taxonomy, is a single synthetic management classification with the goal of covering all names GBIF is dealing with. It's the taxonomic backbone that allows GBIF to integrate name based information from different resources, no matter if these are occurrence datasets, species pages, names from nomenclators or external sources like EOL, Genbank or IUCN. This backbone allows taxonomic search, browse and reporting operations across all those resources in a consistent way and to provide means to crosswalk names from one source to another. It is updated regulary through an automated process in which the Catalogue of Life acts as a starting point also providing the complete higher classification above families.
The Global Biodiversity Information Facility: GBIF Backbone Taxonomy