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Thanks Richard. I just got done writting up the same conclusion. It's nice
to see the same excerpts.
> -----Original Message-----
> From: Richard Tobin [mailto:richard@cogsci.ed.ac.uk]
> Sent: Thursday, November 14, 2002 3:03 PM
> To: xml-dev@lists.xml.org
> Subject: Re: [xml-dev] OT: Where did URI pipe symbol hack originate?
>
>
> >Hah! We've got people looking at that same RFC and saying colons are
> >reserved!
>
> Oh yes, they're reserved all right:
>
> reserved = ";" | "/" | "?" | ":" | "@" | "&" | "=" | "+" |
> "$" | ","
>
> But "reserved" doesn't mean what you might guess:
>
> The "reserved" syntax class above refers to those
> characters that are
> allowed within a URI, but which may not be allowed within a
> particular component of the generic URI syntax; they are used as
> delimiters of the components described in Section 3.
>
> And in the path part of the URI, they don't have any syntactic meaning
> so they're allowed:
>
> abs_path = "/" path_segments
>
> [...]
>
> path = [ abs_path | opaque_part ]
> path_segments = segment *( "/" segment )
> segment = *pchar *( ";" param )
> param = *pchar
>
> pchar = unreserved | escaped |
> ":" | "@" | "&" | "=" | "+" | "$" | ","
>
> On the other hand, you'll see that the production for rel_path makes
> the first segment special; you can't use
>
> C:/foo
>
> as a relative URI, because it would be confused with a scheme
> called "C".
> So you might want to escape colons when generating relative URIs.
>
> -- Richard
>
>
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