16. The computer program product of claim 11 , wherein the edges between nodes have associated weight values, and wherein the weight value of an edge is indicative of a strength of a corresponding relationship between nodes associated with the edge.
16. The computer program product of claim 11 , wherein the edges between nodes have associated weight values, and wherein the weight value of an edge is indicative of a strength of a corresponding relationship between nodes associated with the edge. 17. The computer program product of claim 16 , wherein the weight value of an edge comprises a base weight value that is calculated based on a number of references from a source document to a referenced document associated with the edge.