[Fast-and-lousy response from an airport.]
The @cRef mechanism has essentially been superceded by the
<prefixDef> mechanism, which can be used on any pointer.
> Guidelines specifies that @cRef "specifies the destination of
> the pointer by supplying a canonical reference". I wonder why
> only gloss, ptr, ref, term provide such a canonical forme for a
> pointer. For instance, why is it not possible to specifies the
> @souce attribute of a quote as a canonical pointer?