On Fri, 2009-01-16 at 18:42 +0100, mitu2009 wrote: > Does anyone know the maximum boost factor value for a field in Lucene?
http://hudson.zones.apache.org/hudson/job/Lucene-trunk/javadoc//org/apache/lucene/document/Field.html points to http://hudson.zones.apache.org/hudson/job/Lucene-trunk/javadoc//org/apache/lucene/document/AbstractField.html#setBoost(float) which leads to http://hudson.zones.apache.org/hudson/job/Lucene-trunk/javadoc//org/apache/lucene/search/Similarity.html#encodeNorm(float) which says "The encoding uses a three-bit mantissa, a five-bit exponent, and the zero-exponent point at 15, thus representing values from around 7x10^9 to 2x10^-9 with about one significant decimal digit of accuracy. Zero is also represented. Negative numbers are rounded up to zero. Values too large to represent are rounded down to the largest representable value. Positive values too small to represent are rounded up to the smallest positive representable value" However, setting the field boost to 7x10^9 won't work very well. See the JavaDoc for AbstractField for details. Regards, Toke Eskildsen --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
