Re: [VCARDDAV] [Technical Errata Reported] RFC6350 (3138)

[Simon Perreault <[e-mail]>]

On 2012-02-25 20:40, RFC Errata System wrote:
> Original Text
> -------------
>     param-value = *SAFE-CHAR / DQUOTE *QSAFE-CHAR DQUOTE
>
>     SAFE-CHAR = WSP / "!" / %x23-39 / %x3C-7E / NON-ASCII
>       ; Any character except CTLs, DQUOTE, ";", ":"
>
>
> Corrected Text
> --------------
>     param-value = *SAFE-CHAR / DQUOTE *QSAFE-CHAR DQUOTE
>
>     SAFE-CHAR = WSP / "!" / %x23-2B / %x2D-39 / %x3C-7E / NON-ASCII
>       ; Any character except CTLs, DQUOTE, ",", ";", ":"
>
>
> Notes
> -----
> "5. Property Parameters" states: "Property parameter value elements that contain the COLON (U+003A), SEMICOLON (U+003B), or COMMA (U+002C) character separators MUST be specified as quoted-string text values."
>
> So COMMA cannot be part of a non-quoted parameter value which should be reflected by the SAFE-CHAR declaration.
>
> Otherwise a value of
> X-PARAM=tel,fax
> could be ambiguously interpreted as
> "tel","fax" (separated values)
> and "tel,fax" (combined value containing a COMMA)

This is correct, but then the ABNF wouldn't allow said X-PARAM=tel,fax.

There was a recent discussion about the ABNF inadequacies for parameter 
values. Both the text and ABNF need to be fixed, and there is no quick 
fix. So I suggest to set this errata to "held for document update".

Simon
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