[Xapian-discuss] Lucene ranking

[James Aylett]

Kevin Burton has posted about poor ranking in Lucene preferring
shorter documents over longer ones[1]. A similar search in Xapian
returns documents in the expected order:

Performing query `Xapian::Query(foo)'
3 results found
ID 3 99% [foo foo foo]
ID 2 94% [foo foo]
ID 1 80% [foo]

Anyone know what Lucene is doing here? Their FAQ doesn't mention what
weighting scheme they use, and I don't have time to investigate
further right now ...

[1] <http://www.peerfear.org/rss/permalink/2004/10/26/PoorLuceneRankingForShortText/>

J

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  James Aylett                                                  xapian.org
  james at tartarus.org                               uncertaintydivision.org