Different query/parameter separators in URIs

StackOverflow https://stackoverflow.com/questions/20512652

  •  31-08-2022
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Question

I wonder what the different parameter separators in (SIP) URIs indicate?

Some separated by ;, like: <sip:user@domain.com;foo=bar;x=y>.

Other are separated by ? and &, like: <sip:user@domain.com?foo=bar&x=y>

Was it helpful?

Solution

SIP separator rules comes from RFC 2396 that has been deprecated by RFC 3986. But with some usage specifications defined in section 19.1.1.

To summarize a bit, semicolon ";" is used to separate URI parameters, question mark "?" to signal query component's (stated as "Header fields" in section 19.1.1) starting point, and ampersand "&" is used to separate parameter pairs inside query string ("header fields").

Also worth checking Wikipedia entry: URI scheme

Hope this helps

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