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Re: On validation

From: Henri Sivonen <hsivonen@iki.fi>
Date: Mon, 15 Jun 2009 15:53:46 +0300
Cc: HTMLWG WG <public-html@w3.org>
Message-Id: <EA9DAC36-3754-47DD-AACE-565FA272008A@iki.fi>
To: Sam Ruby <rubys@intertwingly.net>
On Jun 15, 2009, at 15:48, Sam Ruby wrote:

> Henri Sivonen wrote:
>> On Jun 13, 2009, at 00:08, John Foliot wrote:
>>> Which brings *me* back to my ongoing question: why should we care  
>>> about
>>> validity (conformance)?
>> You should care about running a validator, because it points out  
>> mistakes you didn't intend to make and, thus, helps you find  
>> mistakes that would otherwise be slower (i.e. more expensive) to  
>> spot.
>
> I operate a validator for another (and related) specification, so I  
> definitely know where you are coming from, but taking a look at this:
>
> http://html5.validator.nu/?doc=http%3A%2F%2Fwww.google.com%2F
>
> Noting that the last six errors relate to the font element, let me  
> ask: how does this help "you find mistakes that would otherwise be  
> slower (i.e. more expensive) to spot"?


It probably doesn't, but I've avoided simply checking in code that  
violates the spec, because I think having a normative conformance  
definition is valuable in order to foster toolchains where both  
generator parts and checker parts have the same notion of what's OK.

-- 
Henri Sivonen
hsivonen@iki.fi
http://hsivonen.iki.fi/
Received on Monday, 15 June 2009 12:54:25 GMT

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