IAU thesaurus in RDF (an update)
agray at dcs.gla.ac.uk
Wed Oct 10 03:01:41 PDT 2007
The issue of individuals in a thesaurus raises all sorts of questions.
1. Which do you include/exclude?
2. What do you do about the ones that you have missed/not yet
There is also an issue about how to represent individuals in a
1. Are they a concept?
2. Should they only exist as part of a collection?
At the moment, I only have lots of questions about individuals and no
answers and I have spent several days mulling over these issues.
Alasdair J G Gray
Research Associate: Explicator Project
Computer Science, University of Glasgow
0141 330 6292
From: owner-semantics at eso.org [mailto:owner-semantics at eso.org] On Behalf
Of Ed Shaya
Sent: 8 October 2007 15:16
To: Frederic V. Hessman; IVOA semantics
Subject: Re: IAU thesaurus in RDF (an update)
Someone asked if there needs to be Individuals. This already has Sun,
Moon, Earth, Mars and others. It turns out that there are a few that
are needed because other terms are so related to them. Although one
probably could substitute #spicules skos:related #stars for #spicules
skos:related #Sun, etc. But, maybe we should have both. But it is
clear that one should have at least a few Individuals.
Talking about individuals. There is a #velocity_of_light. Do we need
velocity_of_light_in_vacuum to distinguish from in_medium?
infrared_radiation should have broader electromagnetic_radiation, as
ultraviolet_radiation has. Is infrared_radiation synonymous with
infrared_emission? I don't see a way for SKOS to say SameAs. How does
one say iau:stars sameas cds:stars?
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