[whatwg] US-ASCII vs. ASCII in Web Socket Protocol

[Yuzo Fujishima]

I see both "US-ASCII" and "ASCII" are used in:
http://tools.ietf.org/html/draft-hixie-thewebsocketprotocol-54

If they mean the same thing, one should be used consistently.

In the document, US-ASCII seems to mean encoding while ASCII
mean charset. Is this common? (I guess US-ASCII is commonly
considered as an alias for ASCII.
http://en.wikipedia.org/wiki/ASCII#Aliases )

Yuzo