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Re: cardinality of properties for Assertion

From: Shadi Abou-Zahra <shadi@w3.org>
Date: Thu, 01 Dec 2005 16:31:29 +0100
Message-ID: <438F1751.2070701@w3.org>
To: Johannes Koch <johannes.koch@fit.fraunhofer.de>
Cc: public-wai-ert@w3.org

Hi Johannes,

Yes, in most cases we only defined minimum cardinality (sometimes even redundantly of 0) but decided not to put maximum cardinalities *yet*. Once we have a stable schema, we can choose to tune the model and tighten the restrictions.

By the way, we do have some maximum restrictions. For example, there can only be *exactly one* date property per test subject class.

Do you have any comments or suggestions to this?


Johannes Koch wrote:
> Hi list,
> the schema in the 20050711 WD contains information on the minimum 
> cardinality of properties for classes. There is no information about the 
> maximum cardinality. So I assume that it is unlimited. Is that right? Or 
> are there properties that should only appear once?

Shadi Abou-Zahra,     Web Accessibility Specialist for Europe 
Chair and Team Contact for the Evaluation and Repair Tools WG 
World Wide Web Consortium (W3C),           http://www.w3.org/ 
Web Accessibility Initiative (WAI),    http://www.w3.org/WAI/ 
WAI-TIES Project,                 http://www.w3.org/WAI/TIES/ 
Evaluation and Repair Tools WG,     http://www.w3.org/WAI/ER/ 
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Received on Thursday, 1 December 2005 15:42:35 UTC

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