A system, method, and apparatus for information retrieval are provided. Embodiments of the present invention may generate data structures that may be used to process user queries. According to embodiments of the present invention, a processor component configured to perform the operations of an indexing module and a storage module, the indexing module configured to generate a term list and a term-file matrix from information stored on the storage module, the indexing module further configured to generate an adjacency matrix from the one or more files, wherein the adjacency matrix represents a relationship of the one or more terms in each of the one or more files; and the indexing module further configured to generate a probability matrix using the adjacency matrix and a one-step or two-step random walk.