[sc34wg3] Draft Reference Model

Lars Marius Garshol sc34wg3@isotopicmaps.org
18 Nov 2002 23:53:11 +0100

* Sam Hunting
| (2) Is the best/only way to model the prose statement "Hot and cold
| are opposites" an assertion with a single role player that
| represents the set {"hot","cold"}

That seems quite a funny way of doing it to me, and structurally
different from how topic maps represent this, which would more
naturally be

  opposites(hot : opposite, cold : opposite)

In the SAM this is an association item with two role items in its
[roles] property. The transformation to the RM is more involved than
people will expect it to be, and it does seem a little odd.

I realize the rationale is that there should be a node that allows us
to speak about both at the same time, but I'm not sure what the
argument that leads from there to the construction of the set is.

Lars Marius Garshol, Ontopian         <URL: http://www.ontopia.net >
ISO SC34/WG3, OASIS GeoLang TC        <URL: http://www.garshol.priv.no >