Google Testing New Refinement/Clustering Links — Sign Of Google Base In Web Search?

Maybe it’s new — maybe not, but another Google query refinement test is out
in the wild, as covered in our SEW Forums thread
Refinement Keywords
. There are links to screenshots showing that after a
search, a "Quick results" area appears at the top of the page with links that
seem to narrow refine results into clusters/topics. Something similar was
seen last month.

The topics and implementation resemble what happens after a search at Google

, such as with
which brings up this at the top of the page:

Refine your search: 



homes for sale


wanted ads


It makes me wonder if the refinement is going along with some Google Base
material flowing into the main web index as part of a test.

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