> > I think a delimier *is* needed between the MARC tag and the
> > though just to avoid confusion over say numeric subfield names e.g.
> > marc.2451
> > Say marc.245$1 marc245$a for instance?
> We could do that; but isn't it the case that MARC fields are
> all three-digit numbers anyway? In which case 2451 is
> perfectly unambiguous.
Yes, MARC field tags are all three characters - although checking that
in ISO2709 I discovered that a MARC field tag can be alphanumeric which
I'd never realised before! So you might have marc.aaaa for instance (or
I wasn't saying that marc.2451 or marc.aaaa was unambiguous just that it
might be confusing (e.g. for any human reading or entering the CQL by
hand), and marc.245$1 or marc.245.1 or whatever might be easier on the