Hi, See the thread here: http://www.antlr.org/pipermail/antlr-interest/2006-May/016269.html summary: subclass and override match() and/or alter stream etc... Ter On Sep 28, 2006, at 6:03 PM, Dmitry Kakurin wrote: > How do I create case-insensitive lexer with ANTLR 3.0. > The old option > caseSensitive=false > does not work.