1. A segmentation management system comprising: a computer system programmed to manage segmentation of a set of members in a multi-dimensionally modeled data source, wherein the multi-dimensionally modeled data source comprises an Online Analytic Processing database, a segment definition manager, implemented by the computer system, to manage definitions of identifiable non-overlapping segments for a given base set of members in a multi-dimensionally modeled data source, a segmentation engine, implemented by the computer system, to divide the base set of members into the segments based on the definitions of the segments; and a segment application manager, implemented by the computer system, to allow the segments to be used as objects.