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Re: ISSUE-77: Should we mark rdf:Seq as archaic (cf ISSUE-24)

From: Steve Harris <steve.harris@garlik.com>
Date: Fri, 14 Oct 2011 11:56:59 +0100
Cc: RDF Working Group WG <public-rdf-wg@w3.org>
Message-Id: <638B1DB8-3B3D-4039-BFF8-003027D67232@garlik.com>
To: Ivan Herman <ivan@w3.org>
Not only that, it's actually useful.

There's only two (common) syntactic ways of expressing sequences/arrays/vectors, rdf:Seq and RDF Collections.

Both are pretty cumbersome, ugly, and arguably "broken" from some perspective, but as we don't have a valid replacement I don't think we should remove either one at the moment.

- Steve

On 2011-10-14, at 08:39, Ivan Herman wrote:

> (If this was discussed at the WG meeting yesterday, sorry about the lost bandwidth)
> 
> I think we should be a little bit careful here. Indeed, there is a huge deployment of rdf:Seq out there by Adobe via XMP. Essentially, any image (or illustrator file) manipulated by Photoshop or Illustrator, but also photos produced by a number of cameras, have an embedded RDF/XML encoding of the XMP metadata, that include the usage of rdf:Seq (and also rdf:Alt). We may want to contact Adobe on this and see if they would see a problem if we did that. If somebody has direct contacts with the XMP folks, that would be the best; if not, Sandro or I can try to find those via the AC Rep of Adobe. It may well be that they plan to renew XMP, in which case we could get them as part of the conversation.
> 
> As an alternative we may choose to remove Seq & friends from the core RDFS entailment regimes, possible list them as a separate block. That would be very beneficial, because it would remove a major source of 'infinite' rules from the current entailments, ie, would help in getting, eg, the ten Horst semantics (or equivalent) be in the standard. I do not think Adobe would have a problem with that. Alternatively, we may leave them without any semantic statements at all.
> 
> Ivan
> 
> 
> On Oct 13, 2011, at 18:58 , RDF Working Group Issue Tracker wrote:
> 
>> 
>> ISSUE-77: Should we mark rdf:Seq as archaic  (cf ISSUE-24)
>> 
>> http://www.w3.org/2011/rdf-wg/track/issues/77
>> 
>> Raised by: 
>> On product: 
>> 
>> 
>> 
>> 
>> 
> 
> 
> ----
> Ivan Herman, W3C Semantic Web Activity Lead
> Home: http://www.w3.org/People/Ivan/
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> FOAF: http://www.ivan-herman.net/foaf.rdf
> 
> 
> 
> 
> 

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Received on Friday, 14 October 2011 10:57:31 GMT

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