46. The method of claim 42 , further comprising: storing said similarity score in a similarity score database.
46. The method of claim 42 , further comprising: storing said similarity score in a similarity score database. 47. The method of claim 46 , further comprising: calculating a similarity navigation score SNW(O,B), where 
 SNW ( O,B ) =g·S ( O,B ) +h·LA ( B ) +m·FQS ( B ), LA(B) is the link analysis score of B, FQS(B) is the file quality score of B, and g, h, and m are tuning parameters.