reverse lookup

[John Adam <jo...@yahoo.com>]

 
Is there a way to get most significant words of a document if i give a document number.
 
 

		
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Re: reverse lookup

[pr...@gmx.de]

John,

You might take a look at a patch I submitted to lucene-dev this morning
(http://issues.apache.org/bugzilla/show_bug.cgi?id=30429) . It's aimed at
pseudo-relevance feedback, so it automatically adds terms from an initial
answer set to a query, but of course you can do whatever you want with the
terms after they've been ranked. To rank terms and find the best descriptors
the Robertson Selection Value is employed.

Best regards,

Rene

> On Aug 1, 2004, at 10:25 PM, John Adam wrote:
>
> Is there a way to get most significant words of a document if i give a 
> document number.
>

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Re: reverse lookup

[Erik Hatcher <er...@ehatchersolutions.com>]

On Aug 1, 2004, at 10:25 PM, John Adam wrote:
>
> Is there a way to get most significant words of a document if i give a 
> document number.
>

Have a look at the term vector support new in v1.4.  For a document 
number and field name, you get terms and frequencies:

     TermFreqVector vector =
         reader.getTermFreqVector(id, "contents");

Note: you do need to set the storeTermVectors flag on the field during 
indexing to enable it.

Erik


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