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Re: Encoding URI's for xml validation

• To: <xml-dev@l...>
• Subject: Re: Encoding URI's for xml validation
• From: "Thomas B. Passin" <tpassin@c...>
• Date: Sat, 9 Aug 2003 23:58:24 -0400
• References: <20030805191719.34072.qmail@w...> <02c101c35ee6$9f5e6b00$6501a8c0@tbp1> <20030810031635.GT3432@m...>

[John Cowan]

> Thomas B. Passin scripsit:
>
> > In the case of a file: URI, the colon has a special meaning when it
> > separates the scheme form the rest of the URI, but the rest of the URI
does
> > not need the colon to be reserved, so it does not need to be escaped.
>
> Not the issue here.  The question is, are "%3A" and ":" interchangeable?
> RFC 2396 says only the characters in the "unreserved" set are
interchangeable
> with their %xx counterparts.
>

I know my response was not completely to the question in the original post -
I was branching off a bit to the status of ":".  But then, any substabtive
statement about file: URIs tends to get clouded soon after it is uttered.
As to what the rfc says, it also contains this charming bit of language -

" In general, a character is reserved if the semantics of the URI changes if
the character is replaced with its escaped US-ASCII encoding."

But, as the text says elsewhere,

" only the mechanism responsible for generating or interpreting that
component can determine whether or not escaping a character will change its
semantics."

so this bit does not give much practical guidance with respect to the
notorious file: scheme.

BTW, I could not find where the rfc actually says what you mentioned.  What
section is that, John?

Cheers,

Tom P

• References:
  • Encoding URI's for xml validation
    • From: Jerry Sheehan <geralddsheehan@y...>
  • Re: Encoding URI's for xml validation
    • From: "Thomas B. Passin" <tpassin@c...>
  • Re: Encoding URI's for xml validation
    • From: John Cowan <cowan@m...>

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