Recently, the benefits of modular representations of ontologies have been recognized by the semantic web community. With the growing utilization of ontologies in almost all branches of science and industry not only the number of available ontologies has increased considerably but also many widely used ontologies have reached a size that cannot be handled by the available reasoners (like the ontology for Diagnoses for Intensive Care Evaluation (DICE)), some cannot even be loaded into an standard editor eg the Foundational Model of Anatomy ontology (FMA). When system memory and computation time cannot be extended anymore the only feasibility to use existing tools is partitioning of the large ontology into smaller parts. Realization of this divide-andconquer approach requires an infrastructure that supports reasoning over a distributed ontology and partitioning of a large ontology into a distributed ontology.