Dolbico, the Database Of Local Biomolecular Conformers, stores DNA structural data including the information about DNA local spatial arrangement. The main aim of Dolbico is the exploration of DNA structure at a local level. The analysis of local DNA structure is based on a classification system that uses 9 torsional angles (7 backbone angles and two glycosidic torsions) to categorize dinucleotides into several distinct conformational families. The implemented classification workflow is able not only to classify dinucleotides into already existing classes, but is also able to discover new classes in new solved DNA structures.