1. A method of visualizing multidimensional data on a graphical display, comprising: positioning a highest level overview of a set of relational data near a predefined line of a graphical display; forming a plurality of stems that branch outward from the predefined line, and assigning respective sub-topics of the set of relational data to respective ones of the plurality of stems; and generating a bubble near an end of one of the plurality of stems, and including with the bubble an instance of relational data that is pertinent to a particular sub-topic assigned to the one of the plurality of stems.