В разделе 2.1 RF C 1808 показан пример:
<scheme>://<net_loc>/<path>;<params>?<query>#<fragment>
each of which, except <scheme>, may be absent from a particular URL.
These components are defined as follows (a complete BNF is provided
in Section 2.2):
scheme ":" ::= scheme name, as per Section 2.1 of RFC 1738 [2].
"//" net_loc ::= network location and login information, as per
Section 3.1 of RFC 1738 [2].
"/" path ::= URL path, as per Section 3.1 of RFC 1738 [2].
";" params ::= object parameters (e.g., ";type=a" as in
Section 3.2.2 of RFC 1738 [2]).
"?" query ::= query information, as per Section 3.3 of
RFC 1738 [2].
"#" fragment ::= fragment identifier.
В разделе 3.2.2 RF C 1738 рассматриваются URL-адреса FTP; Я не знаю ни о какой другой схеме, которая использует параметры. (Впрочем, до 5 минут go я вообще не знал о части параметров.)