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Re: SILENT tests (ACTION-517)

From: Andy Seaborne <andy.seaborne@epimorphics.com>
Date: Mon, 15 Aug 2011 18:55:21 +0100
Message-ID: <4E495D89.9040700@epimorphics.com>
To: Axel Polleres <axel.polleres@deri.org>
CC: public-rdf-dawg@w3.org
I have now been able to execute the tests:

I disagree with "LOAD SILENT INTO" though.

The operation is:

LOAD SILENT <DoesNotExist> INTO GRAPH <http://www.example.org/>

There are several kinds of error caught by the SILENT:

* The source of the operation does not exist (explicitly 404)
* The source is not contactable (may or may not exist)
* The graph has parse errors.
* Transmission error : partial data recieved (which itself may be legal 
RDF).

A possible implementation [*] is create the destination in the triple 
store, then attempt to read in the remote data.  This avoids needing to 
have a separate place to conduct the operation in case it does wrong.

In the SILENT case, I thinks it's reasonable for the named graph to be 
created in each case for uniformity.  Stores are free to remove it 
instantly like any other empty graph - but the operation should not 
force the issue.

The test assumes it does not exist afterwards.  I suggest not testing 
against possible implementation approaches.  Instead, change into a 
parse error test, with no possible triples even by partial parsing.

	Andy

[*] I have this kind of implementation and also the no-empty-graphs kind.

On 15/08/11 13:22, Axel Polleres wrote:
> Thanks! The syntax errors were indeed not intended and should be fixed now. Moreover, I added test cases for COPY.
>
> best,
> Axel
>
> On 15 Aug 2011, at 14:25, Andy Seaborne wrote:
>
>> I get syntax errors when running these tests:
>>
>> Error:    LOAD SILENT INTO
>> Encountered "<IRIref>  "<http://www.example.org/>  "" at line 1, column 76.
>> Was expecting:
>>       "graph" ...
>>
>> Error:    CREATE SILENT
>> Encountered "<IRIref>  "<http://example.org/g1>  "" at line 1, column 15.
>> Was expecting:
>>       "graph" ...
>>
>> SILENT does not imply ignore syntax errors does it?
>>
>>          Andy
>>
>>
>
Received on Monday, 15 August 2011 17:55:52 GMT

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