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From Prasanna Ranganathan <>
Subject Re: Question about PatternReplace filter and automatic Synonym generation
Date Tue, 06 Oct 2009 00:19:24 GMT

I just saw the reply from Shalin after sending this email. Kindly excuse.

On 10/5/09 5:17 PM, "Prasanna Ranganathan" <> wrote:

>  Can someone please give me some pointers to the questions in my earlier
> email? And and every help is much appreciated.
> Regards,
> Prasanna.
> On 10/2/09 11:01 AM, "Prasanna Ranganathan" <> wrote:
>>  Does the PatternReplaceFilter have an option where you can keep the original
>> token in addition to the modified token? From what I looked at it does not
>> seem to but I want to confirm the same.
>> Alternatively, is there a filter available which takes in a pattern and
>> produces additional forms of the token depending on the pattern? The use case
>> I am looking at here is using such a filter to automate synonym generation.
>> In our application, quite a few of the synonym file entries match a specific
>> pattern and having such a filter would make it easier I believe. Pl. do
>> correct me in case I am missing some unwanted side-effect with this approach.
>> Continuing on that line, what is the performance hit in having additional
>> index-time filters as opposed to using a synonym file with more entries? How
>> does the overhead of using a bigger synonym file as opposed to additional
>> filters compare?
>> Thanks in advance for the help.
>> Regards,
>> Prasanna.

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