Re: [Haskell-cafe] US Patent for the idea of using Haskell to implement UAX #9

This patent has zero practical impact. When the patent was written there was no Unicode support, so the implementation translates the input into lists of integers instead of lists of characters. Crucially this step was also written into all three independent claims (which are the only bit of a patent that actually matters). So you are free to re-implement this algorithm provided that you manipulate lists of characters rather than lists of integers. Now that GHC has full unicode support this should not be a problem. Paul.