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The material- and dataflow constitute a crucial point within the German Barcode of Life Project (GBOL). Within this large-scaled project, a network of interactions span collecting of the physical specimen, to laboratory processing, and finally providing the barcode sequence and metadata. The underlying data system allows tracking the sampled material from the tissue sample to the final barcode sequence and back to the original specimen from an exact geographic location in Germany. The web site www.bolgermany.de provides a portal for the taxonomic experts collaborating with GBOL to check which species and regions still need to be sampled, to order collecting material, to enter and update associated metadata for the collected specimen, and to submit the specimen to GBOL. The DiversityWorkbench framework (www.diversityworkbench.net) functions as a central data repository for the GBOL project. It stores laboratory data and provides the possibility of sharing data among users of the web portal, including the taxon coordinators and curators at the involved institutions. The GBOL consortium, composed mostly of natural history collections, archives and procures the voucher material, and houses the laboratories and workers as well as the various external data services. These data services provide additional information relevant to the workflow and disseminate the results back to the public. Images are archived and disseminated via the morphological data repository MorphDBase (www.morphdbase.de.