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Message-ID: <4929D882.9070009@yahoo.co.uk>
Date: Sun, 23 Nov 2008 22:26:10 +0000
From: markharw00d <markharw00d@yahoo.co.uk>
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To: java-user@lucene.apache.org
Subject: Re: [ot] a reverse lucene
References: <4928D4A8.20500@holsman.net> <49299B73.5090309@getopt.org>
 <4929B752.8090207@holsman.net>
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If you index the queries consider also that they can potentially be 
indexed in an optimised form.

For example, take a phrase query for "Alonso Smith". You need only index 
one of these terms - an incoming document must contain both terms to be 
considered a match. If you chose to index this query on the rare term 
"Alonso" you would get far fewer requests to run this query than if you 
chose to index the comparitively more common "Smith". Basically any 
query with mandatory terms can be "index optimised" to record only the 
rarest mandatory term (rarity typically being measured by using a 
look-up on some background index).

Cheers,
Mark

Ian Holsman wrote:
> Thanks for all the suggestions guys..
> This is great!
>
>
> Andrzej Bialecki wrote:
>> Ian Holsman wrote:
>>> Hi. apologies for the off-topic question.
>>>
>>> I was wondering if anyone knew of a open source solution (or a 
>>> pointer to the algorithms)
>>> that do the reverse of lucene.
>>> By that I mean store a whole lot of queries, and run them against a 
>>> document to see which queries match it. (with a score etc)
>>>
>>> I can see the case for this would be a news-article and several 
>>> people writing queries to get alerted if it matched a certain 
>>> condition.
>>
>>
>> http://www.seas.upenn.edu/~svilen/publications/subscribe.pdf
>>
>>
>>
>
>
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