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.
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. 18. The computer program product of claim 17 , wherein the weight value of the edge is further based on a custom metric applied to the base weight value, and wherein the custom metric is determined based on at least one of a number of edges associated with at least one of a source node or a referenced node associated with the edge, a veracity measure of at least one of the source node or the referenced node associated with the edge, an age of a document associated with at least one of the source node or the referenced node, a determined relative impact of a document associated with at least one of the source node or the referenced node, or positive and negative natural language processing of a document reference in a document associated with the source node.