1. One or more computer-storage media with computer-executable instructions embodied thereon for executing a method for providing a document relevance determination to a selected category for a document contained within a linked network of documents, the network represented by a network map including nodes representing documents and edges representing links between the documents, the method comprising: identifying each node in the network map known to belong to the selected category, identifying each node known to be outside of the selected category, and identifying nodes having an unknown category; assigning a category rank based on the node category identification, wherein each node known to belong to the selected category receives a weight of 1, each node having an unknown category receives a weight that is the inverse of the total number of documents having an unknown category and documents known to be outside the selected category, and each node known to be outside of the selected category receives a weight of 0; identifying each link from each node and each link to each node; assigning link weights based on the identified links; and determining node relevance to the selected category based on the assigned category rank and the assigned link weights.