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From "William W" <>
Subject Re: Clustering lucene's results
Date Thu, 23 Sep 2004 17:51:45 GMT

Hi Dawid,
The demos (under /src/demo) are very good. They have the basic usage 
Thanks Andrzej.

>Dawid Weiss wrote:
>>Hi William,
>>No, I don't have examples because I never used Lucene directly. If you 
>>provide me with a sample index and an API that executes a query on this 
>>index (I need document titles, summaries, or snippets and an anchor 
>>(identifier), can be an URL).
>Hi Dawid :-)
>I believe the approach to this component should be that you first 
>initialize it by reading a mapping of Lucene index field names to "logical" 
>names (metadata) like title, url, body, etc. The reason is that each index 
>uses its own metadata schema, i.e. in Lucene-speak, the field names.
>Moreover, when you execute a query you get just a document id plus its 
>score. It's up to you to build a snippet. There is a code in the 
>jakarta-lucene-sandbox CVS repo. (highlighter) to create snippets from the 
>query and the hit list, take a look at this...
>>Send me such a snippet and I'll try to write the integration code with 
>>Lucene. It is only a matter of writing a simple InputComponent instance 
>>and this is really trivial (see Nutch's plugin code).
>The basic usage scenario is that you open the IndexReader (either using 
>directory name as a String or a Directory instance), and then create a 
>Query instance, usually using QueryParser, and finally you search using 
>IndexSearcher. You get a list of Hits, which you can use to get scores, and 
>the contents of the documents. Take a look at the IndexFiles and 
>SearchFiles classes in org.apache.lucene.demo package (under /src/demo).
>Best regards,
>Andrzej Bialecki
>Software Architect, System Integration Specialist
>CEN/ISSS EC Workshop, ECIMF project chair
>EU FP6 E-Commerce Expert/Evaluator
>FreeBSD developer (
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