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   Well-formed vs. valid

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  • From: "Jeffrey E. Sussna" <jes@kuantech.com>
  • To: "'XML-DEV'" <xml-dev@ic.ac.uk>
  • Date: Mon, 22 Feb 1999 10:58:14 -0800

In spit of my recent editorial about markup vs. type systems, I agree with many of the "opposing" statements that have been made. In particular, I agree with the statement about XML 1.0 as a stable base. The base XML spec is really the only stable part of the family at this point, and we should not in fact f*ck with it.

One thing disturbs me, however. Much talk seems to be made about documents or document fragments being useful because they are well-formed. I don't want something well-formed, I want something "valid". Whether validity is determined by reference to a DTD or to a schema of some other kind, I need more than just the lowest-level syntactic conformance to the XML spec. I need to be able to determine that the XML in question conforms to the syntactic and semantic constraints imposed by my application. Furthermore, I don't want to have to rely on implicit knowledge contained within a proprietary parser in order to do so. 


Kuantech, Inc.                            http://www.kuantech.com
Jeffrey E. Sussna, Principal                     jes@kuantech.com

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