Mike C (10/7/2008)
innomatics (10/7/2008)
Not sure what you mean by "boolean search"?
Generally a search that doesn't compute likeness statistics and therefore can't return and ordered set of results based on best match. Boolean search results are either in or out, there's no similarity measured.
It would be interesting to see how more complex algebraic (e.g. vector space, cosine similarity) and probabilistic search models could be implemented effciently in SQL Server.