A method is implemented in a computerized system that provides access to a search tool capable of searching at least one stored record. The method includes determining whether a search query is a logical query by comparing each search term to a set of logical operators. If a search term is in the set...http://www.google.com/patents/US6430552?utm_source=gb-gplus-sharePatent US6430552 - Method for converting queries with logical operators into free text queries
