Xapian discuss - Nov 2008 - How to get term weight?

Hi,

I have a simple question and I hope somebody could help me: given a Mset
"matches" and a Query "query", how do I get the weight of
the terms in the
query? Suppose I use the BM25 weighting schme and I have the document
statistics from the database "db".

Or put it another way: I followed the code in Xapian and I know that when
Xapian performed the search, it computed "get_sumpart" and
"get_sumextra".
How can I retrieve the query term weight for each document in the Mset?

Thanks,

Kevin

On Tue, Nov 18, 2008 at 03:02:31PM -0500, zhiguo li
wrote:
> I have a simple question and I hope somebody could help me: given a Mset
> "matches" and a Query "query", how do I get the weight
of the terms in the
> query? Suppose I use the BM25 weighting schme and I have the document
> statistics from the database "db".
You already asked this question only yesterday.  Please don't reask the
same question just because you don't get an instant response.  All
you'll do is irritate list subscribers and most likely decreases the
likelihood that you'll get a useful response.
> Or put it another way: I followed the code in Xapian and I know that when
> Xapian performed the search, it computed "get_sumpart" and
"get_sumextra".
> How can I retrieve the query term weight for each document in the Mset?
You can't.  We don't keep the weight contributions around - only the
sum of the contributions over all matching terms for documents which
made it into the MSet.

Cheers,
    Olly