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

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.

> 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,
>
>