Subject: [SIP] HTTP and SIP URLs

From: "Vishwa Kumbalimutt" <[email-masked]>
Date: Fri, 18 Aug 2000 10:36:04 -0700

I had a question about using a HTTP URL as one of the parameters in a
SIP URL.
The parameter of interest is other-param whose syntax is defined as
(from 2543bis)
other-param = pname["=" pvalue ]
where pvalue = param-unreserved | unreserved |escaped
where param-unreserved = "["|"]"|"/"|":"|+|"$"
unreserved = alpahnum|mark
Let's say we have a HTTP URL
http://www.ietf.org/rfc/rfc2396.txt?number=2396
Does "?" need to be escaped since it isn't mentioned in either
unreserved or param-unreserved.
But if it is, "?" is a reserved character in HTTP URLs and this can
change the meaning of the URL.
OR the other option is to include the complete URL in quotes. 
What would be the correct syntax for this?

thanks
vishwa