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Re: another update test added (was: RE: Questions on grammar restrictions on Blank Node reuse across...)

From: Gregory Williams <greg@evilfunhouse.com>
Date: Mon, 28 May 2012 10:41:19 -0400
Cc: public-rdf-dawg@w3.org
Message-Id: <8233DF68-6165-4111-B1ED-DA19B7BB2804@evilfunhouse.com>
To: Andy Seaborne <andy.seaborne@epimorphics.com>
On May 28, 2012, at 9:27 AM, Andy Seaborne wrote:

>> Question to greg here: is this because bnode-labels in greg's implementations are graph-specific? If so, and if these label
>> renamings across graphs are round-trippable, then update 2 should probably also be idempotent, i.e. still the result would be
>> 
>> GS'''' = {}
>>     <g1>  { _:b :p :o }
>>     <g2>  { _:c :p :o }
>> 
>> Is that so?
> 
> No (I hope).
> 
> Greg - can you confirm that the problem is the way the results are specified, not test per se:
> 
> 
> mf:result [
>                ut:graphData [ ut:graph <insert-05-g1-pre.ttl> ;
>                               rdfs:label "http://example.org/g1" ] ;
>                ut:graphData [ ut:graph <c> ;
>                               rdfs:label "http://example.org/g2" ] ;
>             ] ;
> 
> means read the file insert-05-g1-pre.ttl a second and third time, the first being in the mf:action.
> 
> So it generates different blanks nodes each time it's read, hence no shared bank node *in creating the results* -- nothing to do with the operation.

Correct. As I said, and as you describe, the problem is the multiple parsing of the same file into the expected dataset, not in the update evaluation.

> Hence either specify results in TriG/N_quads (but these are under-defined in this area) or make a conclusion that records the intended result and test for that (my long update request suggestion).

Yes. I think your proposed solution (inserting the statement count back into the dataset) is the only sensible path forward on this.

.greg
Received on Monday, 28 May 2012 14:41:47 GMT

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