From: Claus Färber (list-ietf-wg-apps-usefor@faerber.muc.de)
Date: Wed Aug 07 2002 - 13:04:00 CDT
Charles Lindsey <chl@clw.cs.man.ac.uk> schrieb/wrote:
> Now I want to exclude '?', because it is one of the characters that
> introduces an RFC 2047 encoding, and we don't want our encodings to be
> confused with those, do we? Yes, I know that '=' also occurs in RFC 2047
> alongside the '=', but removing one of them is sufficient. Also, I still
> have lingering doubts over '?' in URIs, though it _should_ be unambiguous
> there.
> $ & ' = ^ ~
Not that "&" is unwise as some people are too stupid to write it
correctly within HTML (i.e. as "&").
Further, the "?" is used to seperate the address part from a query part,
which is also used in mailto URIs to seperate the address from further
paramters (e.g. mailto:me@example.com?subject=foo).
Further, the "=" is used to seperate hname from hvalue in RFC 2368 URLs,
so it has to be encoded in RFC 2386 URLs where an address appears in an
parameter, e.g. (mailto:?to=de-l%3dE4rm@example.com). This, of course
does not mean that "=" can't be used; it's still one of the best
characters.
Claus
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