Relevant blog posts: http://richardminerich.com/2011/09/record-linkage-algorithms-in-f-jaro-winkler-distance-part-1/ http://richardminerich.com/2011/09/record-linkage-algorithms-in-f-%E2%80%93-jaro-winkler-distance-part-2/ http://richardminerich.com/2011/09/record-linkage-algorithms-in-f-extensions-to-jaro-winkler-distance-part-3/