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[MMUSIC] RFC 4566bis - issue 13 - SDP Grammar issues

On 10 Nov 2006, at 00:10, Alfred HÎnes wrote:

(13)  SDP Grammar issues  (ABNF in Section 9, p. 39 ff.),

a)
The rule for 'repeat-interval'  (page 41)  could easily have
re-used (incorporated) the 'integer' rule:

   repeat-interval =     POS-DIGIT *DIGIT [fixed-len-time-unit]

is equivalent to:

   repeat-interval =     integer [fixed-len-time-unit]


Valid, but not necessary. Propose no change.


b)
The rule for FQDN, at the bottom of page 42, is wrong;
FQDNs really should allow up to 255 characters!
                         v
|  FQDN =                4*(alpha-numeric / "-" / ".")
                         ; fully qualified domain name as specified
                         ; in RFC 1035 (and updates)

Because details are not gived (can be found at other places),
this rule should perhaps be only minimally corrected to say:

|  FQDN =                *(alpha-numeric / "-" / ".")
                         ; fully qualified domain name as specified
                         ; in RFC 1035 (and updates)
Comments from implementers? This looks reasonable at first glance, although it is an incompatible change to the ABNF. 

--
Colin Perkins
http://csperkins.org/



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