Gopher
The first character of the URL path
part (after the initial single slash)
is a single-character "type" field
which is that used by the Gopher
protocol. The rest of the path is
the "selector string", with disallowed
characters encoded. Note that some
selector strings begin with a copy
of the gopher type character, in
which case that character will occur
twice consecutively in the URL. If
the type character and selector are
omitted, the type defaults to "1".
Gopher links which refer to non-Gopher
protocols are represented directly
as URLs of the underlying access
method and are not represented as
Gopher URLs.