- From: Christian de Sainte Marie <csma@ilog.fr>
- Date: Tue, 15 Apr 2008 18:56:15 +0200
- To: Michael Kifer <kifer@cs.sunysb.edu>
- CC: "Boley, Harold" <Harold.Boley@nrc-cnrc.gc.ca>, RIF WG <public-rif-wg@w3.org>
Michael Kifer wrote: >> >>No, I meant: in "# Equality terms. If t and s are simple, positional, or >>named-argument terms then t = s is an equality term.", shouldn't t and s >>be allowed to be external terms as well (same for #, ## and frame)? >> > I think that equality among external terms should *not* be allowed, since > it cannot be tested anyway (definition of an external term is a black box > to a rif document, by definition). It can be tested by the consumer: if it could not, a RIF document that contained external calls would be useless, wouldn't it? > For instance, one could write External(t) = External(s) > but these two externals' black boxes might not be equal, and the reasoner > will have no way of testing that. I can see that equality or classification terms with external terms may be a problem in the head; but in the body? Christian
Received on Tuesday, 15 April 2008 16:57:15 UTC