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Re: [FT]FTUnaryNot

From: andrewc <andrew.cao@cisra.canon.com.au>
Date: Wed, 23 Mar 2005 08:49:25 +1100
Message-ID: <424092E5.9060907@cisra.canon.com.au>
To: Sihem Amer-Yahia <sihem@research.att.com>
Cc: public-qt-comments@w3.org
Dear Sihem,

Thank you for your reply.
The question comes from when I evaluate "occurs at most 2"  and the 
keyword appears 4 times in context node.
I evaluate it as "occurs not at least 3" using negation over "occurs at 
least 3".
I realize that Result 1 is better than Result 2.

Regards,
Andrew

Sihem Amer-Yahia wrote:

>Dear Andrew,
>
>Sorry for the late reply. We have been busy with getting a new draft
>of the language document ready. FYI, a new version of the draft will
>be accessible soon.
>
>We should get back Result 1.  The reason is that the input AllMatches
>may have been obtained from a combination of full-text FTSelections
>such as distance and ordered and that the only thing a negation (i.e.,
>FTUnaryNot) does is to say that those matches in its input AllMatches
>are to be excluded and it is thus not allowed to "merge" matches as
>you did in Result 2.
>
>What is the intuition behind Result 2?
>
>Thanks,
>Sihem
>
>  
>
>>Date: Fri, 11 Mar 2005 12:15:47 +1100
>>From: andrewc <andrew.cao@cisra.canon.com.au>
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>>
>>Dear editors,
>>
>>Regarding the semantics of FTUnaryNot.If we have an AllMatches 
>>(queryString and queryPos are omitted):
>>
>>AllMatches
>>--- Match
>>     --- StringInclude (pos = 2)
>>     --- StringInclude (pos = 3)
>>     --- StringInclude (pos = 4)
>>--- Match
>>     --- StringInclude (pos = 1)
>>     --- StringInclude (pos = 2)
>>     --- StringInclude (pos = 3)
>>--- Match
>>     --- StringInclude (pos = 1)
>>     --- StringInclude (pos = 2)
>>     --- StringInclude (pos = 4)
>>--- Match
>>     --- StringInclude (pos = 1)
>>     --- StringInclude (pos = 3)
>>     --- StringInclude (pos = 4)
>>
>>If we apply the FTUnaryNot on the above AllMatches, which result shall 
>>we get back (Result 1 or Result 2)?
>>
>>Result 1:
>>AllMatches
>>--- Match
>>     --- StringExclude (pos = 2)
>>     --- StringExclude (pos = 3)
>>     --- StringInclude (pos = 4)
>>--- Match
>>     --- StringExclude (pos = 1)
>>     --- StringExclude (pos = 2)
>>     --- StringExclude (pos = 3)
>>--- Match
>>     --- StringExclude (pos = 1)
>>     --- StringExclude (pos = 2)
>>     --- StringExclude (pos = 4)
>>--- Match
>>     --- StringExclude (pos = 1)
>>     --- StringExclude (pos = 3)
>>     --- StringExclude (pos = 4)
>>
>>Result 2:
>>AllMatches
>>--- Match
>>     --- StringExclude (pos = 1)
>>     --- StringExclude (pos = 2)
>>     --- StringExclude (pos = 3)
>>     --- StringExclude (pos = 4)
>>
>>Thanks,
>>
>>
>>
>>
>>    
>>
>
>
>
>  
>
Received on Tuesday, 22 March 2005 21:50:01 UTC

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