Which is the Authority: The Schema or the Text?

From: cbullard@hiwaay.net
To: xml-dev@lists.xml.org
Date: Thu, 19 Dec 2013 10:51:18 -0600

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A mundane question: given a specification with schemas and text descriptions of values, if these are in conflict which one is authoritative? IOW, would you ignore the text and use the schema values as declared, or modify the schema to match the text>?

All too often, upstream data designers are not reading the schemas. Instead they rely on the text examples (eg, diagrams or instances). So one sees problems such as a string specification with multiple parts that are declared as a pattern (regex) and the parts and patterns don't match (e.g., lengths are not the same). I suspect this is a result of having multiple spec authors and insufficient quality checks in implementations. Normally one would report these and it gets cleaned up but when the spec is already in the field, yadda.

len

Follow-Ups:
- Re: Which is the Authority: The Schema or the Text?
  - From: Michael Sokolov <msokolov@safaribooksonline.com>
- Re: Which is the Authority: The Schema or the Text?
  - From: Steve Newcomb <srn@coolheads.com>
- Re: Which is the Authority: The Schema or the Text?
  - From: Bjoern Hoehrmann <derhoermi@gmx.net>
- Re: Which is the Authority: The Schema or the Text?
  - From: Liam R E Quin <liam@w3.org>

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