Format of tokens

Mon Nov 12 06:37:29 PST 2007

On 12 Nov 2007, at 11:18 am, Alasdair Gray wrote:
> I think there might be a slight problem with your script that  
> generates the vocabularies. If you look at any relationship, you  
> will find that it points to itself rather than another concept.
Whoops!  Fortunately, an easy fix.  Everything should be ok now (only  
affected the RDF files).
> I have done a quick analysis of the IAU93 and IVOAT vocabularies.
>
> Number of
>
> IAU93
>
> IVOAT
>
> Top level concepts
>
> 1720
>
> 1203
>
> Concepts
>
> 2947
>
> 2892
>
> Broader relationships
>
> 1716
>
> 2307
>
> Narrower relationships
>
> 1716
>
> 2307
>
> Associative relationships
>
> 7647
>
> 8040

The major difference between IAU93 and IVOAT (other than the deletion  
of some errors and inclusion of new concepts) is that 1) many top  
level concepts in IAU93 were removed by moving things to aliases or  
noting the obivous BT's and NT's and 2) the number of BT's perfectly  
matches the number of NT's.

The number of top level concepts in IVOAT could easily be halved or  
more if we went to a modest bit of editing effort.

Rick
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