lucene-solr-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From scott chu (朱炎詹) <>
Subject Why it's boosted up?
Date Tue, 24 Aug 2010 04:00:01 GMT
In Lucene's web page, there's a paragraph:

"Indexing time boosts are preprocessed for storage efficiency and written to 
the directory (when writing the document) in a single byte (!) as follows: 
For each field of a document, all boosts of that field (i.e. all boosts 
under the same field name in that doc) are multiplied. The result is 
multiplied by the boost of the document, and also multiplied by a "field 
length norm" value that represents the length of that field in that doc (so 
shorter fields are automatically boosted up). "

I though the greater the value, the boosting is upper. Then why short fields 
are boost up? Isn't Norm value for short fields smaller?

View raw message