I've done some testing with the example docs and it behaves similar when there 
is a zero doc boost. Luke, however, does not show me the index-time boosts. 
Bost document and field boosts are not visible in Luke's output. I've changed 
doc boost and field boosts for the mp500.xml document but all i ever see 
returned is boost=1.0. Is this correct?

Anyway, i'm looking at Nutch now for reasons why i sends a zero boost on a 
docuement.

On Thursday 04 November 2010 14:16:22 Yonik Seeley wrote:
> On Thu, Nov 4, 2010 at 8:04 AM, Markus Jelsma
> 
> <markus.jel...@openindex.io> wrote:
> > The question remains, why does the title field return a fieldNorm=0 for
> > many queries?
> 
> Because the index-time boost was set to 0 when the doc was indexed.  I
> can't say how that happened... look to your indexing code.
> 
> > And a subquestion, does the luke request handler return boost values
> > for documents? I know i get boost values for fields but i haven't seen
> > boost values for documents.
> 
> The doc boost is just multiplied into each field boost and doesn't
> have a separate representation in the index.
> 
> -Yonik
> http://www.lucidimagination.com

-- 
Markus Jelsma - CTO - Openindex
http://www.linkedin.com/in/markus17
050-8536600 / 06-50258350

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