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Re: namespaces

• To: xml-dev@l...
• Subject: Re: namespaces
• From: Norman Walsh <ndw@n...>
• Date: Thu, 31 Jul 2003 09:35:40 -0400
• In-reply-to: <r02000000-1026-15F0B24CBC4211D7A0870003937A08C2@[192.168.124.11]> (SimonSt Laurent's message of "Tue, 22 Jul 2003 08:43:24 -0400")
• References: <r02000000-1026-15F0B24CBC4211D7A0870003937A08C2@[192.168.124.11]>
• User-agent: Gnus/5.1001 (Gnus v5.10.1) Emacs/21.3 (gnu/linux)

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/ "Simon St.Laurent" <simonstl@s...> was heard to say:
| 4) QNames in content seems to be an ever-expanding mess, with no means
| in sight for a normalization method that makes them context-independent.
| (That's largely because there's no simple mapping between QNames and
| URIs - hashes vs. slashes keeps that complicated.)

That's interesting. I usually put the "lexical form" problem before
the "URI/QName" mapping problem. Do we need to solve them both? (Yes,
I suppose we do.)

The URI/QName mapping problem is over-constrained in the general case.
If you want to start with a QName and end with a single string and you
want the operation to be reversible, you're really saying that you
want a structured string value. If you say that you want the resulting
string to be a valid URI, you're effectively saying that concatenation
with a separator is the only choice. And since there are no available
markup characters in URIs to use as a separator, you lose.

Unless you adopt a convention for the URIs that you use as namespace
names, I don't think there's any way to make the mapping reversible.
And no matter what convention you choose, someone will rebel against
it.

                                        Be seeing you,
                                          norm

- -- 
Norman.Walsh@S...    | One of the great misfortunes of mankind is
XML Standards Architect | that even his good qualities are sometimes
Web Tech. and Standards | useless to him, and that the art of employing
Sun Microsystems, Inc.  | and well directing them is often the latest
                        | fruit of his experience.--Chamfort
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• References:
  • namespaces (was RE: rss regularis(z)ation)
    • From: "Simon St.Laurent" <simonstl@s...>

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