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< * [[knngist]] - extension of GiST to provide effective knn (k nearest neighbourhood) search
to
> * [[knngist]] - extension of GiST to provide effective knn (k nearest neighbourhood) search, see [[2009-11-25]] update
Discussion and docs about GiST based contrib modules for PostgreSQL. See GiST development page for main information. GiST programming tutorial is available in Russian.