1. A computer-implemented method, comprising: a computer system generating an information hierarchy comprising a link entry hierarchy and a node hierarchy; wherein the link entry hierarchy is comprised of link entries, and a particular link entry in the link entry hierarchy contains a plurality of link entry identifiers; wherein each link entry identifier of said plurality of link entry identifiers identifies a link entry that is a parent link entry of said particular link entry, the parent link entry identified by said each link entry identifier being different than said particular link entry; wherein the node hierarchy is comprised of nodes, and a child node of the node hierarchy is associated with said particular link entry, wherein said particular link entry defines a link from a parent node to the child node; and wherein a parent link entry of the particular link entry defines a link between a grandparent node and the parent node, wherein the grandparent node is a parent of the parent node in the node hierarchy.