1. A method in a computing device for determining importance of documents with links between documents, the method comprising: generating transition probabilities of transitioning between pairs of source and target documents based on a determination of information available through each target document of a source document, each source document having one or more links to target documents of that source document, the transition probability for transitioning from a source document to a target document is based on the number of links on that target document and the total number of links on the target documents of that source document; storing the generated transition probabilities in a transition probability matrix; calculating importance of documents based on a stationary distribution of the generated transition probabilities stored in the transition probability matrix, the stationary distribution including stationary probabilities of visiting documents; and storing the calculated importance of the documents.
6. The method of claim 1 wherein an initial transition matrix is calculated according to the following: 
 P (N) =( D (N) ) −1 AD (N−1) where P (N) represents the initial transition matrix based on a look-ahead distance of N−1, A represents an adjacency matrix indicating links between documents, and D (N) represents a diagonal matrix with diagonal elements set to d (N) , where d (N) is calculated according to the following: 
 d (N) =Ad (N−1) where d (0) =(1, 1, . . . , 1) n T .