A unique system and method that facilitates improving the ranking of items
is provided. The system and method involve re-ranking decreasing subsets
of high ranked items in separate stages. In particular, a basic ranking
component can rank a set of items. A subset of the top or high ranking
items can be taken and used as a new training set to train a component
for improving the ranking among these high ranked documents. This process
can be repeated on an arbitrary number of successive high ranked subsets.
Thus, high ranked items can be reordered in separate stages by focusing
on the higher ranked items to facilitate placing the most relevant items
at the top of a search results list.