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From Candide Kemmler <cand...@palacehotel.org>
Subject Re: extending the query parser
Date Thu, 12 Mar 2009 19:58:47 GMT
OK great! I'll see what I can do from here.

Thanks!

On 12 Mar 2009, at 12:45, Earwin Burrfoot wrote:

> On Thu, Mar 12, 2009 at 21:16, Candide Kemmler <candide@palacehotel.org 
> > wrote:
>>
>> On 11 Mar 2009, at 23:21, Earwin Burrfoot wrote:
>>
>>> Take ANTLR and roll your own query parser from scratch? It's  
>>> pretty easy.
>>>
>>
>> Hi Earwin,
>>
>> That would be fantastic, since our parser is already specified as  
>> an ANTLR
>> grammar. However, I can't seem to find an antlr grammar in the lucene
>> source. Obviously what we want is to extend the existing query  
>> support, not
>> just create a new one from scratch.
>
> Lucene's default QueryParser uses javacc if I'm not mistaken. And I
> don't see any way to extend it except by patching and using modified
> version.
> If you want to explore some existing alternatives, Mark has an article
> here - http://www.lucidimagination.com/blog/2009/02/22/exploring-query-parsers/
> My personal opinion is that default parser is only suitable for
> something that isn't going to see real world use.
>
>>
>> Regards,
>>
>> Candide
>>
>>> On Thu, Mar 12, 2009 at 04:24, Candide Kemmler <candide@palacehotel.org 
>>> >
>>> wrote:
>>>>
>>>> Hello,
>>>>
>>>> I'm looking at a way to extend the lucene query parser to allow for
>>>> semantic
>>>> computations in IEML space (see http://ieml.org). What I'd like  
>>>> to know
>>>> is:
>>>> how difficult it would be to be able to add clauses to query  
>>>> like: ...
>>>> AND (
>>>> some_IEML_expression) AND ...
>>>>
>>>> some_IEML_expression would involve a reference to some field that  
>>>> would
>>>> contain metadata expressed in that format.
>>>>
>>>> Thanks in advance for you insights.
>>>>
>>>> Candide
>>>>
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>>>>
>>>
>>>
>>>
>>> --
>>> Kirill Zakharenko/Кирилл Захаренко (earwin@gmail.com)
>>> Home / Mobile: +7 (495) 683-567-4 / +7 (903) 5-888-423
>>> ICQ: 104465785
>>>
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>>>
>>
>>
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>>
>
>
>
> -- 
> Kirill Zakharenko/Кирилл Захаренко (earwin@gmail.com)
> Home / Mobile: +7 (495) 683-567-4 / +7 (903) 5-888-423
> ICQ: 104465785
>
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