Latent Semantic Indexing (LSI)

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This is interesting from a thread on webproworld.  If you do a search on
Google using the tilde method like this
or just type "~zoo" into the search box, and you look at the words which
Google highlights, it seems to show how Google is already doing the
"theming" thing that has been discussed for the last year or so.

My theory is that if you were optimising a zoo website then to rank highly,
you should be including key words/phrases such as wildlife, aquarium,
animal, wild animal, wild animal park etc etc

I did a normal search for Zoo, and although the first result had virtually
no text on the page in positions 5 and 7 were San Diego and Philadelphia
Zoos which both have the keywords above.

Last question, does anybody know what searching with a tilde ~ is called?
It's new to me.


Re: Latent Semantic Indexing (LSI)

On Wed, 2 Mar 2005 16:48:40 +0000 (UTC), "small mouse"

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But does any of their backlinks share "wildlife" or "wild animal" or
such keywords as the anchor text?

I don't think Google has fully implemented LSI in the general search
process yet. Some hints of it may be partially implemented but not
like how they implemented stemming. If you use zoos in your text then
you can be found for the word zoo type thoughts but if you use the
word zoo this doesn't necessarily mean you will land in a search for
aquarium or animal or wildlife.

Google is finicky at times. For example if you do search using the
blue for boys
Then Google will share "for is a common word so wasn't used ..." type
thought. Yet the results will bring up pages using that phrase that is
more than likely about the gender color for babies thought. Now drop
the common word that Google said it kinda sorta ignored:
blue boys
And you will get different results, and Top 10 ones may NOT be about
the gender color or male infants at all.
Now, for LSI thoughts, try:
blue males
blue male infants
And see if you get any sites from the "blue for boys" results that do
not have "males" or "male infants" in their onpage or IBL anchor text
or from pages, sharing those IBLs, that may discuss "male infants".

Right now I don't see, on my side, LSI being fully implemented on the
general searches but handy, at times, for expanding a search query


Re: Latent Semantic Indexing (LSI)

small mouse wrote:
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According to google, the tilde is for Synonyms:
If you want to search not only for your search term but also for its
synonyms, place the tilde sign ("~") immediately in front of your search

For example, here's how to search for food facts and nutrition and
cooking information:

Re: Latent Semantic Indexing (LSI)

small mouse wrote:

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Doesn't prove theming, only proves that Google can handle synonyms. I did
this in the past very simple, if someone searched for zoo (for example) I
added related terms as an OR.

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Re: Latent Semantic Indexing (LSI)

On Wed, 2 Mar 2005 16:48:40 +0000 (UTC), "small mouse"

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It's a jungle out there, small mouse.

           Affordable SEO!

Re: Latent Semantic Indexing (LSI)

Quoted text here. Click to load it


Thanks for all the replies, it's good to have a name (synonym search) for
this thing, I did notice that Google only seems to pick the top 5 or so
synonyms for each search term to highlight.

I'm going to use this to prepare for the implementation of LSI, by the way,
I've just done a search for  LSI website optimisation and it looks like
quite a few SEO companies are already optimising pages for this phrase.

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