[geos-devel] GEOS Exceptions

[strk at refractions.net]

On Tue, Apr 19, 2005 at 09:34:11AM -0700, Chris Hodgson wrote:
> 
> >In section 8.3 they have an EMPTY value, something like this:
> >
> >PRIMARY
> > = OPTIONAL SEQUENCE / REPEATED SEQUENCE
> > / SPECIAL SEQUENCE / GROUPED SEQUENCE
> > / META IDENTIFIER / TERMINAL / EMPTY.
> >EMPTY = .
> > 
> >
> If the spec says this as quoted above, then this does in fact mean that 
> EMPTY means nothing.
> It literally says, EMPTY equals nothing, period. I haven't looked at the 
> rest of the spec, but there's nothing ambiguous about it here, IMHO.

That's not OGC SFS spec, but an example in the EBFN spec.
I think you're right here because EMPTY is defined.
OGS SFS does not define EMPTY, and use <bracketed> strings
for defined things.

--strk;