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To: George Doddington <doddington@nist.gov>
From: Hubert Jin <hjin@bbn.com>
Subject: Re: Clarification of tracking
Date: Thu, 5 Nov 1998 17:42:45 -0500 (EST)
My recollection was that topic tracking decision has no lookahead.
Lookahead within a file [usually half hour] probably won't help
anyway.
-Hubert
On Thu, 5 Nov 1998, George Doddington wrote:
> James Allan wrote:
>
> > Tracking has a lookahead component, too. The contents of any story up
> > to the end of the lookahead component is valid information. If my
> > delay is 0, then I can use all of the story information in that "file"
> > (i.e., that half-hour of news). If I have a lookahead of 10, I get a
> > bunch more data to look at.
>
> This is not correct. Topic tracking decisions must be made by the
> end of the current source file. Decisions may be deferred to the
> end of the source data file being processed, but no further.
> --
> George Doddington at NIST: doddington@nist.gov or 301/975-3261
>
>
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Last updated Fri Nov 6 15:29:23 1998