According to Elizabeth Taylor:
> I am trying to find out if Ht://Dig uses reverse indexing and boolean
> logic to obtain search results or if it also uses vector space
> retrieval?
Hmmm. I don't know what vector space retrieval is. htdig builds a word
index that tells htsearch essentially which document contain a given word.
I believe this is known as a reverse index, although the term doesn't
make intuitive sense to me, as I'd think of this as a conventional index.
htsearch does build a boolean expression out of the given search words,
or can be given a boolean expression directly, and it will parse that
boolean expression to determine the set of matching documents. Does this
help clarify matters?
--
Gilles R. Detillieux E-mail: <[EMAIL PROTECTED]>
Spinal Cord Research Centre WWW: http://www.scrc.umanitoba.ca/~grdetil
Dept. Physiology, U. of Manitoba Phone: (204)789-3766
Winnipeg, MB R3E 3J7 (Canada) Fax: (204)789-3930
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