bonus for exact case match

[David Spencer <da...@tropo.com>]

Does anyone have any experiences with giving a bonus for exactly 
matching case in queries?

One use case is in the java world maybe I want to see references to 
"Map" (java.util.Map)  but am not interested in a (geographical) "map".

I believe, in the context of Lucene, one way is to have an Analyzer that 
returns a TokenStream which, in cases where a word has some upper case 
characters, returns the word twice in that position, once as-is and once 
in lower case,  using the magic of Token.getPositionIncrement(). Then 
you'll need a query expander or whatnot which, when given a query like 
"Map", expands it to "Map^2 map".

Thoughts/comments?


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