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- From: Tim Bray <tbray@textuality.com>
- To: Paul Prescod <paul@prescod.net>, "'XML Dev'" <xml-dev@ic.ac.uk>
- Date: Mon, 31 May 1999 12:45:54 -0700
At 02:05 PM 5/31/99 -0500, Paul Prescod wrote:
>I'm talking specifically about the definition of HTTP URLs.
>
>"The HTTP URL scheme is used to designate Internet resources accessible
>using HTTP (HyperText Transfer Protocol)."
>
>(I guess from a formal logic perspective it should end with "and no
>others")
No, that's not a "formal logic" change, that's a huge basic semantic
change. If the IETF had wanted to forbid people using these for
other purposes, they should say so. Note that one of the co-editors
of the URI RFC is one T. Berners-Lee, who among other things signed
off on the namespace spec.
>If you use them to designate non-Internet resources NOT accessible by HTTP
>then I consider that an obvious abuse, even if the HTTP spec. isn't
>sufficiently anal to disallow the practice from a formal logic
>perspective.
Uh, namespace URIs do not designate resources. The namespace spec
is crystal-clear on this. They serve as names, that's all.
>Otherwise I could put http:// URLs on my website and say: "Oh, you were
>supposed to interpret those as gopher URLs. The URL spec. doesn't disallow
>that you know!"
That analogy is bogus - the semantic of a URL, when used in a web hyperlink,
is well-defined. We are not specifying that the namespace URI be used as
anything but a string, for comparison purposes. There is no convincing
evidence that this violates the letter or spirit of any standard
anywhere. -Tim
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