31. An apparatus comprising: memory; one or more computers configured to: parse patent data to generate a set of nodes; select at least one node of the set of nodes; determine initial links from meta data associated with the patent data for the at least one node; create links among the set of nodes based on the metadata; identify a set of seed nodes; determine a community structure for the set of seed nodes, the community structure including a plurality of communities; and assign concepts to the plurality of communities, wherein determining the community structure comprises: initiating a percolation message from a source node of a linked network, the linked network comprising a plurality of nodes and a plurality of edges, each edge connecting at least two of the plurality of nodes, wherein a node is a neighbor if the node is connected to another node in the plurality of nodes by an edge, wherein the percolation message comprises a percolation probability and an identifier of the source node, and wherein initiating a percolation message from the source node comprises transmitting the percolation message to each neighbor of the source node with the percolation probability; propagating the percolation message through the linked network, wherein propagating the percolation message through the linked network comprises: transmitting the percolation message from each node that receives the percolation message to each neighbor of each node that receives the percolation message; and transmitting a response to the source node from each node that receives the percolation message; collecting each response to the percolation message at the source node; and storing a list of nodes that transmitted the response at the source node.
31. An apparatus comprising: memory; one or more computers configured to: parse patent data to generate a set of nodes; select at least one node of the set of nodes; determine initial links from meta data associated with the patent data for the at least one node; create links among the set of nodes based on the metadata; identify a set of seed nodes; determine a community structure for the set of seed nodes, the community structure including a plurality of communities; and assign concepts to the plurality of communities, wherein determining the community structure comprises: initiating a percolation message from a source node of a linked network, the linked network comprising a plurality of nodes and a plurality of edges, each edge connecting at least two of the plurality of nodes, wherein a node is a neighbor if the node is connected to another node in the plurality of nodes by an edge, wherein the percolation message comprises a percolation probability and an identifier of the source node, and wherein initiating a percolation message from the source node comprises transmitting the percolation message to each neighbor of the source node with the percolation probability; propagating the percolation message through the linked network, wherein propagating the percolation message through the linked network comprises: transmitting the percolation message from each node that receives the percolation message to each neighbor of each node that receives the percolation message; and transmitting a response to the source node from each node that receives the percolation message; collecting each response to the percolation message at the source node; and storing a list of nodes that transmitted the response at the source node. 35. The apparatus of claim 31 , wherein the initial links are selected from the group consisting of links between patents, links between inventors, links between examiners, links between authors, links between corporations, and links to papers.