Hilltop algorithm

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The Hilltop algorithm is an algorithm created by Krishna Bharat while he was at Compaq Systems Research Center and George A. Mihăilă, then at the University of Toronto. The algorithm is used to find topic relevant documents to the particular keyword topic.

The algorithm operates on a special index of expert documents. These are pages that are about a specific topic and have links to many non-affiliated pages on that topic. Pages are defined as non-affiliated if they are authored by people from non-affiliated organizations. Results are ranked based on the match between the query and relevant descriptive text for hyperlinks on expert pages pointing to a given result page. Websites which have backlinks from many of the best expert pages are authorities and are ranked well.

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