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Re: Semantic meaning of double quotation marks delimiting quoted-string

From: David Morris <dwm@xpasc.com>
Date: Sun, 28 Oct 2007 15:51:00 -0800 (PST)
cc: <ietf-http-wg@w3.org>
Message-ID: <Pine.LNX.4.33.0710281548060.9272-100000@egate.xpasc.com>


My reading of the grammer you included is that the " character is a
separator and therefore not part of the charset name which by those
productions is a token.

On Sun, 28 Oct 2007, Julian Reschke wrote:

>
> Geoffrey Sneddon wrote:
> >> The simple answer is: the double quotes are part of the entity tag. So
> >> a response header such as
> >>
> >>     ETag: x
> >>
> >> would simply be invalid and should be ignored.
> >
> > I am aware — but how is the receiving end meant to deal with them? Is it
> > meant to keep the quotation marks around any quoted-string, even when
> > that therefore results in non-exist things like a character set called
> > "UTF-8" (with quotes)? Or does the behaviour need to be specific to each
> > and every use of quoted-string need to have it defined separately?
>
> That may be the case.
>
> Do you have a specific header in mind? I just followed the grammar for
> "Accept-Charset", and as far as I can tell if you have double quotes in
> a charset value, it should be considered part of the charset name:
>
>    Accept-Charset = "Accept-Charset" ":"
>             1#( ( charset | "*" )[ ";" "q" "=" qvalue ] )
>
> (<http://greenbytes.de/tech/webdav/rfc2616.html#rfc.section.14.2>)
>
>   charset = token
>
> (<http://greenbytes.de/tech/webdav/rfc2616.html#rfc.section.3.4>)
>
>      token          = 1*<any CHAR except CTLs or separators>
>      separators     = "(" | ")" | "<" | ">" | "@"
>                     | "," | ";" | ":" | "\" | <">
>                     | "/" | "[" | "]" | "?" | "="
>                     | "{" | "}" | SP | HT
>
>      CHAR           = <any US-ASCII character (octets 0 - 127)>
>
> (<http://greenbytes.de/tech/webdav/rfc2616.html#rfc.section.2.2>)
>
> Now that really smells like something that is implemented differently in
> practice...
Received on Sunday, 28 October 2007 23:51:19 GMT

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