Quasar classification (in Re: WD-Ontology)

[Alexandre RICHARD]

Thanks for the correction. Indeed the disjoints and subsumption were 
incorrect for QSOs.

As for the name issue (QSO vs Quasar), it is not up to me to decide 
which is best but it is not of such importance as long as it is the 
name of a concept in the ontology since we can associate adequate 
display names to each concept and display them in place of the concept 
name.

Cheers

Alexander

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Quoting Kjetil Kjernsmo <kjetil at kjernsmo.net>:

> On Wednesday 21 February 2007 16:22, Andrea Preite Martinez wrote:
>> QuasiStellarObject
>
> Sorry to be bursting in from the sideline here. :-) I have not worked in
> astrophysics for a few years (rather worked with the Semantic Web), but
> I was confused about both the chosen name and the RDF that follows it.
> I don't know if it is appropriate to address my concerns in this forum,
> or if it has been decided elsewhere, but here goes:
>
> I have been of the impression, especially from Julian H. Krolik's
> excellent text book on Active Galactic Nuclei, that the AGN community
> now prefers to "forget" that there ever was anything "stellar" in
> quasars. Allthough it has great historical significance, it now only
> serves to confuse people. I think that the community generally
> recommends that "quasar" is adopted as a new word, and that if one
> wants to distinguish different kinds of quasars by their radio
> properties, they should be called "radio-quiet" and "radio-loud".
>
> Quasars are clearly Active Galactic Nuclei, however, and so the RDF/XML
> OWL fragment confused me even more:
>   <owl:Class rdf:ID="QuasiStellarObject">
>     <owl:disjointWith>
>       <owl:Class rdf:about="#ActiveGalaxyNucleus"/>
>     </owl:disjointWith>
>   <owl:Class>
>
> I'd rather say that:
>   <owl:Class rdf:ID="QuasiStellarObject">
>     <rdfs:subClassOf>
>       <owl:Class rdf:about="#ActiveGalaxyNucleus"/>
>     </rdfs:subClassOf>
>   <owl:Class>
>
> and if using the terms I think the AGN community would prefer,
>   <owl:Class rdf:ID="Quasar">
>     <rdfs:subClassOf>
>       <owl:Class rdf:about="#ActiveGalaxyNucleus"/>
>     </rdfs:subClassOf>
>   <owl:Class>
>
> I hope that this input is useful and that mine or other's confusion can
> be cleared up.
>
> Best,
>
> Kjetil
> --
> Kjetil Kjernsmo
> Programmer / Astrophysicist / Ski-orienteer / Orienteer / Mountaineer
> kjetil at kjernsmo.net
> Homepage: http://www.kjetil.kjernsmo.net/     OpenPGP KeyID: 6A6A0BBC
>