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 Received on 2007-11-12Z15:37:53