Determining the relevance of a web node is disclosed. A seed score value
of a first type is assigned to a seed set of nodes. A score value of a
second type is derived for the web node based on a mapping of a
reachability relationship between one or more seed nodes and the web
node. A score value of the first type is derived for the web node based
on a mapping of a reachability relationship between the web node and one
or more evaluation nodes having derived weight values of the second type.
Content analysis is performed.