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From Niels Ott <>
Subject Combining keyword queries with database-style queries
Date Wed, 22 Oct 2008 13:14:30 GMT
Hi everybody,

I need to query for documents not only for search terms but also for 
numeric values (or other general types). Let me try to explain with a 
hypothetical example.

Assuming there is a value for the number words in each document (or the 
number of person names, or whatever), I would want to formulate a query 
like "Give me documents containing 'jack johnson' AND with token_count > 

I've been working with Lucene before and the keyword part is easy, but 
what would be a good solution to query for numbers etc.?

One first idea I had was storing the numbers (which are basically a 
HashMap<String,Double>) in the index in some way or the other. But it is 
not at all obvious for me how to query them then.

Another thing I could think of would be using a separate database of any 
type, but then how to bring those two together in a way that makes sense?

Any pointers to useful resources and any types of hints are welcome! :-)



Niels Ott
Computational Linguist (B.A.)

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