[XESAM] RDF vs .Desktop

[Gunnar Aastrand Grimnes]

The characters are not redudant, the format doesn't care about
whitespace, so you can't use the initial tab/spaces to know that all
the triples belong to the first subject. The . character is used to
terminate triple about a subject, ; is used introduce more (property,
values) with the same subject and ',' (comma) can be used to have more
values for the current subject and property.

Of course you can come up with your own version where whitespace DOES
matter, and these characters are removed, but that feels quite
counter-productive to me.

At the end of the day not so many people will write this format by
hand. It's not hard to write a simple ontology editor that can
serialize to proper N3 (I sent around some machine-generated examples
in the irc meeting that still look nice)

- Gunnar

On 18/05/07, Mikkel Kamstrup Erlandsen <mikkel.kamstrup at gmail.com> wrote:
> 2007/5/17, Evgeny Egorochkin <phreedom.stdin at gmail.com>:
>
> > Just realized that I KISSed examples too much and didn't notice a mistake.
> > Need to sleep more :( and stop talking to myself...
> >
> > Anyway, resource has to have a prefix: or has to be included in <>
> brackets.
> >
> > Also, I changed field naming to xesam:Audio.composer. This seems to be
> better
> > due to Jamie's wish to explicitly link DC and other external ontologies. I
> > don't object this either.
> >
> > These two examples now look like this:
> >
> > =========    #1      ======================
> > =====================================
> > @prefix DC:
> <http://freedesktop.org/standards/DC#>
> > @prefix xesam:  <
> http://freedesktop.org/standards/xesam#>
> > @prefix :
> <http://freedesktop.org/standards/xesam_base# >
> >
> > xesam:Audio.Composer
> >         a                       :field;
> >         :of_type                :string;
> >         :has_parent     DC:Creator;
> >         :name           "Composer"@EN;
> >         :name           "Композитор"@RU;
> >         :description    "Audio composer".
> > =====================================
> >
> > =========     #2    =======================
> > You can map rdf:Property to something other like file:Property
> > not sure which is better. Any ideas for the prefix since xesam: is now
> used?
> > I still strongly advise to use #2 an not #1.
> > =====================================
> > @prefix rdf:
> <http://www.w3.org/1999/02/22-rdf-syntax-ns# >.
> > @prefix DC:
> <http://freedesktop.org/standards/DC#>
> > @prefix type:
> <http://freedesktop.org/standards/xesam_base# >
> > @prefix xesam:  <http://freedesktop.org/standards/xesam#>
> > @prefix :
> <http://www.w3.org/2000/01/rdf-schema# >
> >
> > xesam:Audio.Composer
> >         a                               rdf:Property;
> >         :range                  type:string;
> >         :subPropertyOf          DC:Creator;
> >         :label                  "Composer"@EN;
> >         :label                  "Композитор"@RU;
> >         :comment                "Audio composer".
> > =====================================
> >
> > Will re-check this when I wake up once more :)
> >
> > Sorry for confusion.
>
> Thanks the examples.  I think it looks unintuitive that the "a" entry does
> not have a :-prefix while the others don't. Also this format clearly contain
> superfluous characters, like the leading :'s and trailing ;'s. If you write
> a .desktop file it is pretty hard getting syntax errors...
>
> I liked the first example in your first mail the best, but I'm a bit
> confused now... Was it valid or invalid? - And why did your prefer the one
> with redundant characters?
>
> Cheers,
> Mikkel
>
>
>