Hi Ceki, I have been reading through the Cal10n code, which I cloned from Git so as to get the most up to date. I'd like to offer a patch file containing some suggested changes - see attached. * some javadoc alterations * more fields are private * some fields are final to distinguish them from 'accumulator' variables (this shows my functional programming tendencies!) * CAL10NResourceBundle hasChanged method now computes the periodicity correctly * CAL10NResourceBundle has new getMap() method to remove the assumption that there is only one parent level. I may be able to put together a first effort at integrating Cal10n with Ant; it depends on how busy I am this week and whether my colleagues want to try out Cal10n further. (I've done bits of Ant before - the javah task is my work). Regards, Rick -- Big Bee Consultants Limited : Registered in England & Wales No. 6397941 Registered Office: 71 The Hundred, Romsey, Hampshire, SO51 8BZ