Re: Is XML Schema a constraint language or a specification lan

From: Mukul Gandhi <mukulg@softwarebytes.org>
To: Roger L Costello <costello@mitre.org>
Date: Wed, 21 Apr 2021 20:24:51 +0530

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On Wed, 21 Apr, 2021, 5:57 PM Roger L Costello, <costello@mitre.org> wrote:

Is an XML Schema a constraint language? An XML Schema states constraints that must be satisfied by instances for them to be "valid". Determining if an instance is valid is a constraint satisfaction problem.

Or, is an XML Schema a specification language? An XML Schema is a specification that informs instance document authors how to construct instances. Determining if an instance is valid is a matter of checking that the instance adheres to the specification.

I find both of above interpretations about XML Schema language synonymous.

--
Regards,
Mukul Gandhi

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Follow-Ups:
- Re: Is XML Schema a constraint language or a specification language?
  - From: Ihe Onwuka <ihe.onwuka@gmail.com>

References:
- Is XML Schema a constraint language or a specification language?
  - From: Roger L Costello <costello@mitre.org>

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