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Re: Conformance checkers

From: Henri Sivonen <hsivonen@iki.fi>
Date: Thu, 2 Aug 2007 11:43:07 +0300
Message-Id: <DAE3E705-D13E-4B5F-A76E-D81BCA5BB70A@iki.fi>
Cc: Jirka Kosek <jirka@kosek.cz>, "public-html@w3.org" <public-html@w3.org>
To: Karl Dubost <karl@w3.org>

On Aug 2, 2007, at 07:16, Karl Dubost wrote:

> A third possibility is to make a list of all conformance statements  
> that a conformance checker has to check. It has the benefit to  
> create an easy to read, process list for implementers of such tools  
> and to guarantee uniformity across tools.

That would have a non-trivial opportunity cost considering what else  
the editors could be doing. As a conformance checker implementor  
myself, I wouldn't want to tarpit the editors by tasking them with  
creating alternative views to the spec.

> plus there are sections of the spec with MUST requirements, which  
> are difficult to implement for a conformance checker.
>     Some of the algorithms in this specification, for
>     historical reasons, require the user agent to pause
>     until some condition has been met. While a user agent
>     is paused, it must ensure that no scripts execute
>     (e.g. no event handlers, no timers, etc). User agents
>     should remain responsive to user input while paused,
>     however.

Conformance checkers are exempt from executing scripts.

Henri Sivonen
Received on Thursday, 2 August 2007 08:43:15 UTC

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