I've been browsing the reference.rst file in the CVS tree. Is there a difference between "Keyword Tuple" and "Argument Tuple"? If not, then I believe "Argument Map" be a better name, since some of the expression semantics (and their runtime complexities) are similar to those of a map. Accordingly, I would change "Index Expression" to "Keyword Expression" and "Index Default Expression" to "Keyword Default Expression". A person reading "Index Expression" for the first time might think it was a specialized "Integral Constant Expression". Let me know if I'm missing anything. Cromwell D. Enage __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com