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Re: graphs are sets?! (was: rdfms-difference-between-ID-and-about (was: Issues list update/status?))

From: Pat Hayes <phayes@ai.uwf.edu>
Date: Fri, 5 Oct 2001 09:38:40 -0500
Message-Id: <p0510100eb7e375d6579b@[205.160.76.189]>
To: Jan Grant <Jan.Grant@bristol.ac.uk>
Cc: w3c-rdfcore-wg@w3.org
>On Thu, 4 Oct 2001, Aaron Swartz wrote:
>
>>  On Thursday, October 4, 2001, at 09:34  AM, Jeremy Carroll wrote:
>>
>>  > I would prefer test1.nt to only have one line if they are
>>  > identical. The
>>  > graph is a set.
>>  > A comment explaining the deletion would then be helpful.
>>
>>  Whoa, whoa, whoa, I don't think we ever agreed to this. It was
>>  my understanding the output was a bag (there wasn't harm in
>>  doing so), but could be interpreted as a set.
>>
>>  When was this changed?
>
>The MT would give the same interpretation for equivalent arcs in a
>multigraph, wouldn't it?

Yes, in fact RDF graphs are multigraphs. However, that means that the 
MT works just as well if they are sets or bag. Bags is semantically 
harmless and puts a lighter burden in implementers, so I would vote 
for bag.

Pat


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Received on Friday, 5 October 2001 10:38:44 EDT

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