Hello Christian & Co., nothing BaseX related, and maybe totally uninteresting to you, but as it seems, you put some major efforts into the full text search, it could be one of those nerdy passions, where one is just hungry and wants more food on the topic: TRE: A Regex Engine with Approximate Matching / http://ducktape.blot.im/tre-a-regex-engine-with-approximate-matching -- Minden jót, all the best, Alles Gute, Andreas Mixich