Re: Functions in N3 (was: Re: What Happened to the Semantic Web?)

Gregory,

are you still planning to upload the vocabularies?

I have a use case for it :) To specify the function to apply in a FILTER.
I'd much rather use a function URI than a label literal.


Martynas

On Fri, Oct 13, 2017 at 5:30 PM, Gregory Williams <greg@evilfunhouse.com>
wrote:

> /cc Ivan Herman
>
> On Oct 13, 2017, at 8:14 AM, Andreas Harth <andreas@harth.org> wrote:
> >
> > The lack of URIs for SPARQL functions has irked me for a while.
> >
> > We have been using N3 as rule syntax in our Linked Data-Fu system,
> > and have found that the CWM builtins [1] are problematic.  Some really
> > useful functions are missing (such as isLiteral(), isURI, datatype()),
> > and some of the existing functions are underspecified concerning the
> > support for datatypes.
> >
> > SPARQL has a much more complete set of functions and it would be nice to
> > be able to use those in N3.  Defining a prefix for the SPARQL builtin
> > functions (and operators) should be easy.  I wonder why nobody has done
> > that already.
>
> During the SPARQL 1.1 WG, it was always my intention to define IRIs for
> all the built-in functions. We even set up a namespace for it[1]. Alas, it
> seems it was never properly populated, as BOUND is the only function with
> an assigned IRI. Maybe it would still be possible to get those all
> assigned—I still have local working copies of what I think should be in
> /ns/sparql.
>
> Thanks,
> Greg
>
> [1] https://www.w3.org/ns/sparql