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Re: review of SWC section 2 (ACTION 518)

From: Jos de Bruijn <debruijn@inf.unibz.it>
Date: Thu, 26 Jun 2008 09:36:43 +0200
Message-ID: <4863470B.7010505@inf.unibz.it>
To: Sandro Hawke <sandro@w3.org>
CC: public-rif-wg@w3.org

Sandro Hawke wrote:
> Reviewing "Symbols in RIF Versus RDF/OWL" in SWC [1], it looks good.


> The one thing I'd like to see would be a little more explanation of when
> and how blank nodes are observably different from constants.  Right
> after:
>> However, in contrast to blank nodes, which are essentially
>> existentially quantified variables, RIF local symbols are constant
>> symbols. 
> maybe add something like this (which may be wrong)...
>      In many applications and deployment scenarios, this difference is
>      inconsequential, so RDF blank nodes can be considered to be
>      equivalent to RIF local symbols.  However the difference can
>      produce different results when an RDF graph is used in a
>      non-assertional context, such as in a query pattern.

I thought this statement was a bit too strong (especially the word 
"equivalent" .  Instead, I wrote:
"In many applications and deployment scenarios, this difference may be 
inconsequential. However the results will differ when an RDF graph is 
used in a non-assertional context, such as in a query pattern."

> If this subject is covered elsewhere in a document, a link would be
> fine, but I couldn't find it.
> I did find this bit in Section 3:
>> _ :x ex:hasName "John" . 
>> saying that there is some blank node that has the name "John",
> which should, I think, be:
>      saying that there is something, denoted here by a blank node, which
>      has the name "John" 
> (it's not the *node* which has the name John.)


> Also, a minor editorial point, I noticed the links to specific Use Cases
> point to the TR version of the document.   I believe they should point
> to the Wiki version, so they'll end up (when published) pointing to the
> concurrently published version of UCR instead of the old one.


Thanks for the comments.

Best, jos

>     -- Sandro
> (This complete ACTION-518 [2])
> [1] http://www.w3.org/2005/rules/wiki/SWC#Symbols_in_RIF_Versus_RDF.2FOWL_.28Informative.29
> [2] http://www.w3.org/2005/rules/wg/track/actions/518

Jos de Bruijn            debruijn@inf.unibz.it
+390471016224         http://www.debruijn.net/
Public speaking is the art of diluting a two-
minute idea with a two-hour vocabulary.
   - Evan Esar
Received on Thursday, 26 June 2008 07:35:49 UTC

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