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Re: telecon Thursday, 1600 UTC

From: Ivan Herman <ivan@w3.org>
Date: Fri, 21 Dec 2007 17:36:30 +0100
Message-ID: <476BEB8E.1000209@w3.org>
To: Manu Sporny <msporny@digitalbazaar.com>
CC: RDFa <public-rdf-in-xhtml-tf@w3.org>

Manu Sporny wrote:
> Ivan Herman wrote:
>> <div about="#q"><div resource="A" rel="a:b"/></div>
>> which yields
>> <#q> a:b <A>
> Correct.
>> or the Bnode from a hanging rel, like
>> <div about="#q" rel="q:r"><div resource="A" rel="a:b"/></div>
>> <#q> q:r [ a:b <A> ].
> Also, correct (I think)... although, I don't think we have a test case
> for this at the moment.

Well... this is in contradiction with... (see below)

>> The behaviour of @instanceof seems to follow the same pattern for most
>> of the cases, but you seem to imply that, somehow, in some cases, an
>> extra BNode is generated for the subject of @instanceof. Can anybody
>> tell me what the result of, say:
>> <div about="#q" rel="q:r"><div instanceof="q:s"/></div>
>> is? My instinct would say
>> <#q> q:r [ rdf:type q:s ]. Manu, you say above
>>From my understanding, which includes Ben's most recent proposal, this
> is the behavior of @instanceof:
> 1. Applies to @about or @src if either exist on the current
>    element, @about takes precedence over @src.
> 2. Creates a new bnode if there is no @about or @src on the current
>    element.

... THIS! If the @instanceof creates a bnode if there is no @about or
@src, then @instanceof can never be bound to a 'hanging rel', so to say,
ie, to a bnode generated in the parent. I think that is a serious flaw,
in my view; I have been saying that many times now...


>>>>  <div resource="A" instanceof="B" />
>>> _:x rdf:type B
>> But WHICH _:x are you talking about? A new one just created for the
>> local instanceof? Is it an inherited subject from the parent?
> I'm talking about the new one that was just created for the local
> @instanceof. @instanceof does not inherit anything, ever.
>>>>   <a href="A" instanceof="B">label</a>
>>> _:x rdf:type B
>>> Again, I thought we agreed that @instanceof doesn't apply to @href.
>> More exactly: we agreed that, for almost all aspect of the processing,
>> @resource and @href behave in an identical manner.
> Correct!
> We talked about Mark's most recent e-mail[1] and it deviates from the
> understanding of the group
> -- manu
> [1]http://lists.w3.org/Archives/Public/public-rdf-in-xhtml-tf/2007Dec/0125.html


Ivan Herman, W3C Semantic Web Activity Lead
Home: http://www.w3.org/People/Ivan/
PGP Key: http://www.ivan-herman.net/pgpkey.html
FOAF: http://www.ivan-herman.net/foaf.rdf

Received on Friday, 21 December 2007 16:36:26 UTC

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