It has to work in SPARQL as well. That reduced the possible characters.
Together with visually pairing star and finish (it can nest, so start !=
finish), a two char token is the choice.
If the grammar bans nesting, then a lot of the grammar had to be duplicated
for with annotation and without because the inside of {||} is general.
Andy
On Mon, 21 Dec 2020, 18:28 Laura Morales, <[email protected]> wrote:
> Everything is clear, thank you. But can I just say, that {| |} is so ugly.
> Since the spec is still WIP, is there any chance that it could be changed
> to something else? A 1-character symbol maybe?
>
>
>
>
> > Sent: Monday, December 21, 2020 at 1:00 PM
> > From: "Andy Seaborne" <[email protected]>
> > To: [email protected]
> > Subject: Re: Turtle* same term twice
> >
> >
> >
> > On 21/12/2020 11:34, Laura Morales wrote:
> > > Pardon, a couple of things that are not completely clear to me:
> > >
> > > - is :a :b :c {| :d "object" |} a valid Turtle syntax? I've
> never seen it before
> >
> > Yes - it is the new annotation syntax for RDF*
> >
> > See the link in previous email to the RDF-start community test cases.
> >
> > >
> > > - if I load this with Fuseki/Jena << :a :b :c >> :d :e . will
> Jena automatically create the :a :c :c triple? This is important for me to
> know, or if there is a switch to enable this behavior
> >
> > No, it will not create the triple ":a :b :c"
> >
> > << :a :b :c >> :d :e .
> >
> > is one triple.
> >
> > subject = << :a :b :c >>
> > predicate = :d
> > object = :e
> >
> > Simply write:
> >
> > :a :b :c .
> > << :a :b :c >> :d :e .
> >
> > or use
> >
> > :a :b :c {| :d :e |}
> >
> > (the latter is not in 3.17.0)
> >
> > This is different to the original paper. This is the same as RDF-star
> > community specs at the moment.
> >
> > Annotation syntax arose to make it convenient to assert and annotate at
> > the same time.
> >
> > Always asserting ":a :b :c" when <<>> is used is limiting;
> >
> > << :a :b :c >> :withdrawn "2020-12-31" .
> >
> > is impossible because :a :b :c would still be there. i.e. you can't talk
> > about a triple without it being "true" - true means
> > graph contains (:a :b :c)
> >
> > Some of the use cases :
> > https://w3c.github.io/rdf-star/UCR/rdf-star-ucr.html
> >
> > Andy
>
