Hello, A few months ago I submitted a small patch to ExtLib to the UTF8 module, adding three small but important functions - substring - output_uchar - eof The patch hasn't been integrated in the ExtLib SVN (I've checked the trunk and tags on the SVN at code.google.com). As it's actually a patch against Camomile, (at the time I didn't know at the time that UTF8 was taken from Camomile), Richard Jones suggested that this is where the patch should go. Could you provide a substring function or integrate the patch into Camomile? Also maybe you could host Camomile at forge.ocamlcore.org... Attached is the diff against ExtLib 1.5. -- Berke Durak