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Re: 18. consequences.

From: Ivan Herman <ivan@w3.org>
Date: Wed, 20 Apr 2011 14:34:14 +0200
Cc: Richard Cyganiak <richard@cyganiak.de>, RDF-WG <public-rdf-wg@w3.org>
Message-Id: <19617851-8BA1-4707-8FEB-DB5072A4A112@w3.org>
To: Andy Seaborne <andy.seaborne@epimorphics.com>

On Apr 20, 2011, at 13:35 , Andy Seaborne wrote:

> 
> 
> On 20/04/11 10:56, Richard Cyganiak wrote:
> 
>> The consequence of the decision are, as I see it:
> ...
>> b) It is a change that breaks compatibility between SPARQL 1.0 and
>> SPARQL 1.1, in a *minor* and *easily characterized and motivated*
>> way.
> 
> I don't think it's minor.  Evidence to show it is would be good.
> 
> One way would be to add a WG note (highlighted box) to the Turtle spec as it is published as WD and in LC to make sure the change is noticed.
> 
> 
> For people with deployed queries, a software upgrade will now either silently change the meaning of a query (only occurs for BGP trailing 18.) or creates a syntax error in otherwise working systems (the case of "18. .").  That's a big deal for them and their software suppliers.
> 
> It's because of the success that these things become significant.
> 
> Establishing a message somehow that further changes to existing systems would be good.

The way I read these lines is as if you were opposed to make any change here. Is that correct? (Just want to understand.)

Ivan

> 
>> Overall that's a change for the better, I think.
>> 
>> Best, Richard
> 
> 	Andy
> 


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Ivan Herman, W3C Semantic Web Activity Lead
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Received on Wednesday, 20 April 2011 12:33:29 GMT

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