On Fri, 11 Jan 2008 07:42:49 -0000, Frank Ellermann
<nobody(_at_)xyzzy(_dot_)claranet(_dot_)de> wrote:
But SSP introduces unnecessary [FWS], where it
is not required as separator, simplified:
| tag = "dkim" [FWS] "=" [FWS] ( "x" / "y" )
The "=" already separates name and value, you
could as well write:
| tag = "dkim=" ( "x" / "y" )
The world is full of protocols which ask you to write parameters of the
form
<name> "=" <value>
Some of them allow SP/WSP around the "=", some allow folding as well
(maybe even comments), and some allow nothing. The biggest problem is for
users to remember what they are/are not allowed to do in each case. Our
first duty should be not to make that problem worse (supposing we can
discern in which direction "worse" arises).
The nearest and best knwon precedent is MIME <parameter>s, which allow
full CFWS around the "=" (though it requires rather careful reading of RFC
822 to confirm that). Of course, nobody (FSVO "nobody") goes the whole hog
by putting comments there, nor even spaces, but whitespace is quite
common. Which suggests we should allow at least WSP*. I am happy to forget
the full CFWS, and probably FWS too.
--
Charles H. Lindsey ---------At Home, doing my own thing------------------------
Tel: +44 161 436 6131
Web: http://www.cs.man.ac.uk/~chl
Email: chl(_at_)clerew(_dot_)man(_dot_)ac(_dot_)uk Snail: 5 Clerewood Ave, CHEADLE, SK8 3JU, U.K.
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