Hi Alexandre, ICUTransformFilter is working fine for greek characters alone as per requirement. but one case it's breaking( σ & ς are the lower forms of Σ Sigma).
*Example:* I indexed the terms πελάτης (indexed as πελατης) & πελάτηΣ (indexed as πελατης). I get the expected search results if I perform the search for πελάτηΣ (or) πελάτης (or) any combinations of upper case & lower case Greek characters. But if I search as πελατησ I won't get any search results. In Greek, σ & ς are the lower forms of Σ Sigma. And this case is solved in ICUFoldingFilter. Is ICU Transliterator rule formed right? Kindly look at the below code TokenStream tok = new ICUTransformFilter(tok, > Transliterator.getInstance("Greek; Lower; NFD; [:Nonspacing Mark:] Remove; > NFC;")); Kindly help me to resolve this. Regards, Chitra