[IsTom]

There's only one RFC though.

[Roboprog]

RFC 4180: http://tools.ietf.org/html/rfc4180

... which is compatible with the data I used to get out of Lotus-123 (and some other things) back in the 80s.

[jtheory]

Only one RFC... but that doesn't mean you can just reject all Excel-exported CSV as "invalid" and force those people to figure out some other solution. :(