> From: Saašha Metsärantala
> Thanks for this link. There, one can read that
> "RFC5646 has superceded RFC4646"
> The e-mail refers to rfc5656 and RFC5656, though.
RFC 5646 http://tools.ietf.org/html/rfc5646 supercedes RFC 4646
as reflected in both http://www.loc.gov/standards/mods/changes-3-5.html and the draft 3.5 schema. (The email announcing the draft may have had a typo.)