Re: First meeting of our group

Dear all,

He already mentioned it, but I would like to repeat that Sandro created 
a new git-repo for us where we can continue our discussions and add a 
list of existing N3 implementations: 
https://github.com/w3c/N3/blob/master/README.md

Thank you, Sandro.

I furthermore closed the doodle and fixed January 21st at 17:00 UCT for 
our first meeting. Hope that many of you can join. I will send a 
separate Mail about this meeting later.

Kind regards,
Doerthe

Am 11.12.18 um 18:03 schrieb Doerthe Arndt:
>
> Dear all,
>
> Now that Dave offered to provide us a W3C git (thank you once again!), 
> we should move on to the next point and identify the topics we want to 
> work on. I set up a doodle to find the right time for a  first 
> meeting. Based on your answers so far, I thought that 16:00 UCT was 
> the best time for such a meeting but if you think differently just let 
> me know and I will adapt the doodle:
>
> https://doodle.com/poll/h7xrxhuwfvy8aqmu
>
> The list of open topics we discovered so far was (note that is an open 
> list, I just summarize here what I remember):
>
>   * Provide a *formal semantics *for N3, open issues there:
>       o *Implicit quantification:* scoping of universal variables and
>         existential variables (blank nodes)
>       o *Explicit quantification: *what is the scope of @forSome and
>         @forAll? Do we want to allow any URI as variable?
>       o *Meaning of built-in functions: *we need to agree on built-ins
>         we want to see as part of N3 logic and formalise them.
>       o *Meaning of cited formulas: *we need to agree on one
>         formalisation for the meaning of cited formulas.
>       o *Formalisation of a proof calculus *(but this can only be done
>         after fixing the meaning of formulas).
>       o *Lists: *lists are treated differently in RDF and N3 do we
>         want to keep that? than we should clarify the relations of the
>         standards.
>
>
>   * To agree on formal semantics we really should focus on the
>     expected *use cases* and here I would like to get some insights*.
>     *We especially need to know:*
>     *
>       o *Which built-ins do we need?* Candidates are the ones which
>         are already implemented for Cwm
>         (https://www.w3.org/2000/10/swap/doc/CwmBuiltins), or the one
>         identified by the RIF working group
>         (https://www.w3.org/TR/rif-dtb/) or we could also look into
>         the different functions which are available in SPARQL filters.
>       o *How do want to use cited graphs: *There is a whole list how
>         the related concept TriG could be understood
>         (https://www.w3.org/TR/rdf11-datasets/). Behind these there
>         are for sure applications which drove the definition*s *and I
>         think it could help to understand what these were. But I also
>         think that all of you have ideas how to use the concepts, so
>         maybe we could create examples?*
>         *
>       o *How expressive does the rule reasoning need to be? *This will
>         influence how we formalise the quantification, so I would like
>         to know where you want to use N3 reasoning for.
>
>
>   * We should also keep the *relation to other standards* close:
>       o we should try to align with RDF where possible
>       o do we need a JSON-LD specification?
>       o what is the position towards TriG? Reification? RIF?
>
>
>   * Together with the formalisation we should also discuss whether we
>     provide a reference implementation together
>
> I would like to add these topics to the git as soon as we have it, we 
> can also all propose new issues, discuss them there and prioritize. I 
> hope that we end up with a short list of things we all tackle together.
>
> So, for a first step, please fill in the doodle till the end of the week.
>
> Kind regards,
> Doerthe
>
>
> -- 
> Dörthe Arndt
> Researcher Semantic Web
> imec - Ghent University - IDLab | Faculty of Engineering and Architecture | Department of Electronics and Information Systems
> Technologiepark-Zwijnaarde 19, 9052 Ghent, Belgium
> t: +32 9 331 49 59 | e:doerthe.arndt@ugent.be  

-- 
Dörthe Arndt
Researcher Semantic Web
imec - Ghent University - IDLab | Faculty of Engineering and Architecture | Department of Electronics and Information Systems
Technologiepark-Zwijnaarde 19, 9052 Ghent, Belgium
t: +32 9 331 49 59 | e: doerthe.arndt@ugent.be