The document "Sub-interval Numerical Types for Common Lisp" has been revised by its author Marco Antoniotti. It has also changed its name - the previous name was "Extra Numerical Types for Common Lisp". This document is still in its initial stage and will be finalized on April 9, 2008, unless withdrawn by the author beforehand. See http://cdr.eurolisp.org/document/5/ for more details.

Pascal