[Sip-implementors] Suggestion in parser grammer to avoid unambiguity

[Sarju Garg]

Hi all,   Section 4.1 says " The elements are seperated by SP characters." Though the grammer suggests only a single SP character.   I suggest to reword this line to " The elements are seperated by a single SP character." to avoid unambiguity   The grammer for url-parameter is as follows: url-parameters = *(";" url-parameter) url-parameter = transport-param | user-param | method-param | ttl-param | maddr-param | other-param   THis suggest that any parameter can come twice which otherwise is not true. This is not explicitly written anywhere may be we can add define the grammer to say this explicitly   url-parameters = *(";" url-parameter) ; all param atmost once url-parameter = transport-param | user-param | method-param | ttl-param | maddr-param | other-param   Thanks Sarju