1. A computer-usable medium having computer-readable program code embodied therein for causing a computer system to perform operations comprising: accessing data that represents a hierarchy of information included in a plurality of different object structures, wherein said data is stored as a plurality of two-dimensional matrix representations, each of said matrix representations storing pair-wise connections between objects from a first level of said hierarchy of information and objects from a second level of said hierarchy; comparing elements of a first matrix representation selected from said matrix representations to a correlation threshold; and identifying a cluster of said object structures associated with elements of said first matrix representation that satisfy said correlation threshold.