Hi all,

I have two questions related to the Nutch/Lucene ranking.

1) Does anyone know how the posting lists (term -> doc1 doc2 doc3) from the
index are sorted?
It is used a TFxIDF value, the boost value or none to sort documents (doc1
doc2 doc3)? Does Lucene compute the ranking for all the documents in the
posting lists or only part?

2) Does anyone know how to add more ranking features to the ranking function
of Nutch (eg. Pagerank, BM25)?
The NutchSimilarity class that extends the DefaultSimilarity from Lucene is
insufficient to achieve this. It is only prepared to change the TFxIDF
function.

Thanks in advance.

--

Miguel Costa

HYPERLINK "http://xldb.fc.ul.pt/~mcosta/"http://xldb.fc.ul.pt/~mcosta/



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