[CL] Representing untyped concepts in CG Display Form

[sowa at bestweb.net]

I forgot to  respond to the following point:

> Further, if I
would want to do the same with a co-reference variable
> instead
of "Bus42", to indicate that John goes with /something/
(maybe
> he travels by plane or rides a horse, no one knows), what
then? Could I
> use the empty box for this in the display form:
 
An empty box with nothing inside, such as '[ ]', is
syntactically correct.  It means that there exists something of some
unknown type to which there is no coreference link specified.
If you
need to refer to that unknown thing, you can put a coreference label
inside, such as [*x29].  You could write [: *x29], but the colon is not
necessary, since the * distinguishes it as a coreference
label.
John
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