A system and method are provided for determining document relevance determination to a selected category for a document contained within a linked network of documents. The network may be represented by a network map including nodes representing documents and edges representing links between the documents. The method may include 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. The method may also include assigning a category rank based on the node category identification, identifying each link from each node and each link to each node, and assigning link weights based on the identified links. The method may additionally include determining node relevance to the selected category based on the assigned category rank and the assigned link weights. An origination domain and a destination domain for each link may be determined such that link weights are assigned for both incoming and outgoing links for each node.