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RE: SD2 - Structured Attributes

From: James Clark <jjc@jclark.com>
Date: Fri, 16 May 1997 20:22:36 +0700
Message-Id: <>
To: "'w3c-sgml-wg@w3.org'" <w3c-sgml-wg@w3.org>
At 23:45 15/05/97 -0700, Andrew Layman wrote:

>Regarding the question of whether any problem the could be solved via
>attributes could also be expressed as subelements: I believed that once.
>But the following sort of example convinced me otherwise:
>Suppose I have a program the processes author tags such as:
><author>William Shakespeare</author>
>Now somebody updates the document to a newer version, say like:
>What is the value of author?

What do you mean by value?  Do you mean "how will it be displayed?" or
something else?

>If the policy is to ignore all unknown tags, the author is "William
>Shakespeare12345". If the policy is to ignore all unknown elements, the
>author is " ". 

The conclusion I would draw from that is that neither policy will be
adequate, but it's a big leap to infer from this that structured attributes
are necessary.

What if the new markup were


(with no space between first and last)?  Structured attributes wouldn't help
you there.  They don't seem to me to be a very good solution to this sort of

Received on Friday, 16 May 1997 09:39:04 UTC

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