[Ontology-editors] cross products

[Chris Mungall]

On Apr 9, 2009, at 7:27 AM, Jennifer Deegan (nee Clark) wrote:

> Hi Chris,
>
> If I find a graph, like the one attached, where the intersection  
> tags show exactly the same as the existing relationships, is it  
> right that I leave both sets in?

yes

> Would I be right in thinking that the normal relationships show what  
> is 'necessary' for the child term, where the intersectionss show  
> what is 'necessary and sufficient', and that this is why we keep both?

well N+S implies N. We keep both in so that we can do a simple filter  
of all N+S conditions and retain a complete graph.


>
> Thanks,
>
> Jen
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