On Tuesday 30 October 2007, Frederic V. Hessman wrote:
> Is there
> > an example of how the combination of two tokens (in the case of
> > FilamentEruption) works in practice, either in an existing schema
> > or other XML doc?
>
> No, indeed: we've just barely got past the point of agreeing that
> there should be vocabularies/thesauri.
>
> Indeed, this need will be common to all VO contexts, so it would be
> great to have a standard solution. I once suggested using the
> rdf:Bag et al. elements, e.g.
>
> <rdf:Bag id="LMSAL:FilamentEruption">
> <rdf:li resource="ivoat:solarfilaments">
> <rdf:li resource="ivoat:eruptions">
> </rdf:Bag>
>
> but I admit that it's not an elegant solution (assuming that our
> computers care). Our original idea of using a UCD-like may have had
> many faults, but the ease of concatenation wasn't one of them. Now
> that the semantics crew is about to suggest SKOS as the IVOA
> standard, we've almost defined the path but haven't defined the goal.
I don't think there is any need for use to create our own prescription. One way is to simply use OWL/RDFS; One can simply create a document where you define "FilamentEruption" as the subclass of "ivoat:solarfilaments" and "ivoat:eruptions", e.g.
<owl:Class rdf:about="&mynamespace;FilamentEruption">
<rdfs:subClassOf rdf:resource="&ivoat;eruptions"/> <rdfs:subClassOf rdf:resource="&ivoat;solarfilaments"/> </owl:Class>
There is probably a way to do this without OWL (but why do that??).
=brian Received on 2007-10-30Z16:06:24