[Sip-implementors] SIP grammar issue

[Benoit Thiery]

Hello,

I would like to write a SIP parser. When analyzing RFC3261 grammar, I 
see one problem.

For the rules :
Accept       = "Accept" HCOLON [ accept-range *(COMMA accept-range) ]
accept-range = media-range *(SEMI accept-param)
media-range  = ( "*/*"
              / ( m-type SLASH "*" )
              / ( m-type SLASH m-subtype )
              ) *( SEMI m-parameter )
accept-param = ("q" EQUAL qvalue) / generic-param
m-parameter  = m-attribute EQUAL m-value
m-attribute  = token
m-value      = token / quoted-string
How can I distinguish an accept-param of the accept-range and an 
m-parameter of the media-range as they can both be any "token EQUAL 
token" and they are both separated by SEMI ?

Kind regards,

Benoit

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