Hi David, I thought it may be usedful to move or copy my proposal[1] to the ERR5RS namespace. Some of the ideas outlined in the proposal might be useful in the ERR5RS process. Nils [1] http://scheme-punks.cyber-rush.org/wiki/index.php?title=A_Concrete_and_conservative_proposal -- Nils M Holm <nmh at t3x.org> -- http://t3x.org/nmh/