A method and system for determining temporal importance of documents
having links between documents based on a temporal analysis of the links
is provided. A temporal ranking system collects link information or
snapshots indicating the links between documents at various snapshot
times. The temporal ranking system calculates a current temporal
importance of a document by factoring in the current importance of the
document derived from the current snapshot (i.e., with the latest
snapshot time) and the historical importance of the document derived from
the past snapshots. To calculate the current temporal importance of a web
page, the temporal ranking system aggregates the importance of the web
page for each snapshot.