W3C home > Mailing lists > Public > w3c-sgml-wg@w3.org > January 1997

Re:Link Indirection

From: Digitome Ltd. <digitome@iol.ie>
Date: Sun, 05 Jan 1997 11:48:11 +0000
Message-Id: <199701051108.LAA03124@GPO.iol.ie>
To: w3c-sgml-wg@www10.w3.org
[Peter Flynn]
>That's the very problem...I would not expect all browsers to adhere to
>HyTime, whether it is prescribed/recommended/whatever in the XML spec
>or not; and in any event, our discussion seems to turn on the precise
>aspect of this which causes the difficulty -- what to do with DTD-less

[Eliot Kimber]
DTD-less instances is a good point and a strong argument for using
attributes only when you expect your data to be used in such an environment.
During the Genesis of XML authors might say to themselves:-

"Some XML browsers support DTDs. Some do not. For widest possible coverage
with my XML docs I should aim at the lowest common denominator XML
Therefore I will do Hypertext entirely via attributes. Therefore I have to do
a ton of extra markup in my docs:-(

After the promised land is reached, and all XML browsers support DTDs this will
result in a "legacy XML" situation where Hypertext etc. has been hard-wired
via attributes and thus that much more difficult to maintain :-((("

Is this the case?

If so, the only way of circumventing this that I can see is getting the
browser and
the server to hand-shake to agree on the browsers capabilities.

DTD-Challenged XML Client gets a "SPAMmed" version of the XML document.
DTD-Aware XML CLient gets Instance + DTD.

This preserves the XML doc is a maintainable state (easy to change AF stuff
in DTD 
and have the changes refelected immediately in the instances) whilst avoiding
creating hard-wired instances.

Sean Mc Grath
Received on Sunday, 5 January 1997 06:08:44 UTC

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