 hayes'
&gt; Cc: standard-upper-ontology@majordomo.ieee.org
&gt; Subject: RE: SUO: RE: Re: More KIF-ified Ontology Content
&gt; 
&gt; 
&gt; Dear Matthew, 
&gt; 	.		Thanks for this explanation. I 
&gt; certainly agree about
&gt; the restrictions with 3D models 
&gt; 
&gt; 	.	However, I still don't understand why relations 
&gt; do not also
&gt; have a time dimension. For example, what about two beings which have
&gt; friendly relations at some periods and hostile ones at other 
&gt; times? Other
&gt; such re