You can analyze creation date of each indexed item and boost the resulting
Lucene documents accordingly. For example, I'm using the following formula:
" dateBoost = 1 + (DateBoostCoeff - 1)/(distance.TotalDays + 1) ", where
distance.TotalDays is the difference in days between DateTime.Today and item
creation date. Then simply " doc.SetBoost(dateBoost) ". This formula fits my
needs, but you'll probably have to experiment with different formulas a bit
to find out what fits your model.
Now all this gets much more complex if you're using incremental indexing,
but there's a solution for it as well.
Regards,
Pavlo Zahozhenko
On Tue, Dec 22, 2009 at 1:18 PM, Robert Pohl <[email protected]> wrote:
> Hi all,
>
> Is there a way to boost index position?
> I want to achieve a result that is basically sorted by the latest (added to
> the index) on top, as well as text relevance.
> For example I search for tiger woods, and don't want articles from last
> year (in the first places).
>
> Thanks,
> Rob
>
>
