[Xapian-discuss] word pair indexing and querying

[James Aylett]

On Thu, Sep 21, 2006 at 06:14:35PM +0100, richard at lemurconsulting.com wrote:

> > (Hmm ... we don't have a way of giving one half of a Query() branch a
> > bigger weight than another, do we? I'm thinking of having an operator
> > which effectively just frobs q_t appropriately in BM25.)
> 
> We don't currently, but such a thing would be very easy to implement.  The
> hardest part would be making a reasonable interface for it in the API.

We could have a new constructor to Xapian::Query():

----------------------------------------------------------------------
using Xapian;
// with q1, q2
Query q = new Query(Query::OP_WEIGHTED_OR, q1, q2, 2.0);
// q1 terms are twice as important as q2
----------------------------------------------------------------------

or something similar. Or, I suppose, an optional parameter to the end
of every query constructor that weights the first leg over the second
(or a float iterator for the iterator constructor?).

J

-- 
/--------------------------------------------------------------------------\
  James Aylett                                                  xapian.org
  james at tartarus.org                               uncertaintydivision.org