Re: Text about SPARQL-star built-in functions ready

On 03/03/2021 11:23, Pierre-Antoine Champin wrote:
> 
> On 03/03/2021 10:21, Olaf Hartig wrote:
>> James,
>>
>> On tisdag 2 mars 2021 kl. 21:09:13 CET James Anderson wrote:
>>> good evening;
>>>
>>>> On 2021-03-02, at 18:56:40, Olaf Hartig <olaf.hartig@liu.se> wrote:
>>>>
>>>> Hi all,
>>>>
>>>> I have implemented the proposal [1] to add the five new built-in 
>>>> functions
>>>> to the spec. See the following PR
>>>>
>>>> https://github.com/w3c/rdf-star/pull/118
>>>>
>>>> For your convenience, here is the link to the preview:
>>>>
>>>> https://pr-preview.s3.amazonaws.com/w3c/rdf-star/pull/118.html
>>>>
>>>> The changes are in Section 4.2 (SPARQL-star Grammar) and in the new
>>>> Section 4.4 (Function Definitions).
>>>>
>>>> As agreed during our telco last Friday, I will leave this PR open for
>>>> three days so that your can take a look at it and raise concerns (if 
>>>> any).
>>>> Unless anyone brings forward reasons that this PR should not be merged,
>>>> I will merge it on Friday afternoon (CET).
>>> i raise the concern, that the approach needs to comprehend quads 
>>> before it
>>> will be usable.
>> Not sure what exactly you mean by "quads." There is no definition of 
>> such a
>> notion (neither in the RDF and SPARQL specs, nor in any draft of the 
>> RDF-star
>> spec).
> 
> I was about to make the same remark.
> 
> Of course, the term "quad" is often used as a shortcut, in conversations 
> about RDF and SPARQL (and even in SPARQL's EBNF grammat), but ultimately 
> its understanding relies on the well defined notions of triple, graph 
> and dataset. As these 3 notions have been extended for RDF-star, I 
> consider that, by transitivity, the (informal) notion of quad is also 
> covered.

There isn't a single way to use quads. There are different ways to use 
quads, primarily around how the default graph is treated.

And some fully compliant stores don't have quads.

     Andy

> 
>> Also, I don't see what "quads" have to do with the PR which focuses on 
>> the
>> five new built-in functions.
>>
>> Please clarify.
>>
>> Thanks,
>> Olaf
>>
>>
>>> best regards, from berlin,
>>
>>
>

Received on Wednesday, 3 March 2021 19:25:02 UTC