Re: Non-PK tables, blank nodes, and leanness

It seems clear that DM should generate

   _:1 <IOU#BORROWER> "Alice".
   _:1 <IOU#AMOUNT> 10.
   _:2 <IOU#BORROWER> "Alice".
   _:2 <IOU#AMOUNT> 10.

If that's what the spec says, we are done.

There may well be a RDF semantics/SPARQL issue lurking here but that's another matter.
All the best, Ashok

On 4/24/2012 1:13 PM, Juan Sequeda wrote:
> This is a non lean RDF graph and per the RDF semantics, they are equivalent.
>
> Gotta love the RDF semantics.
>
> So, even though they are equivalent per RDF semantics, we still maintain the cardinality. But if we query in SPARQL, we get two different things. Therefore, there is a mismatch between the semantics of SPARQL and RDF. Interesting, eh?
>
> Juan Sequeda
> www.juansequeda.com <http://www.juansequeda.com>
>
> On Apr 24, 2012, at 9:53 PM, David McNeil <dmcneil@revelytix.com <mailto:dmcneil@revelytix.com>> wrote:
>
>> On Tue, Apr 24, 2012 at 1:44 PM, Richard Cyganiak <richard@cyganiak.de <mailto:richard@cyganiak.de>> wrote:
>>
>>       _:1 <IOU#BORROWER> "Alice".
>>       _:1 <IOU#AMOUNT> 10.
>>       _:2 <IOU#BORROWER> "Alice".
>>       _:2 <IOU#AMOUNT> 10.
>>
>>
>> Maybe I don't understand blank nodes properly. I thought the graph above was asserting the existence of two unique resources (since there are two blank node IDs).
>>
>> Thanks.
>> -David