Hi, The page at http://incubator.apache.org/lucy/docs/perl/Lucy/Plan/FieldType.html is a bit sparse on detail about the boost property.
I'd like to get a better understanding of how and by how much it's value influences score (rank) in search results - what's the formula used when boost is applied to a document's score? Finally, what are reasonable values (upper/lower) for boost when, in my case eg, I'd like to influence the score based on an external value (page rank), but not have my page rank completely skew the scores - just enough to promote pages which have an organic page rank value which should be considered to some degree (a very broad subject, I know). My tests so far show that a boost value with a small variance in the mantissa has an almost zero influence on score/ranking. My thinking is to boost with something akin to $boost+=LogN(PR) - ie between 0-10 (log scale). So this boils down to: is using a scale of 1-10 a good idea w.r.t. the Lucy boost property to influence ranking, or 10x that value? Any thoughts? -- Regards, gk
