Shoot. "good practice" != "enforce", so I will have to deal with the implications of the possibility in the parser. :-(
Hey, btw, could you change the default respond-to address of the mailing list to "email@example.com"? I try to remember to add it every time I use respond, but I *always* forget eventually. It makes for a very broken conversation for others trying to read on the list!!!
I think it is "good practice" at the very least. Unless there's a really good reason not to (e.g., resolving mapping of types that don't quite match between different systems, such as between Perl numbers to Java integers, or whatever).