Re: [search-ws] cql bnf

["Dr R. Sanderson" <azaroth@liverpool.ac.uk>]

> Okay. Is there any need of talking about reserved words at all then
> -- as they don't actually appear to be reserved in any way. Or am I
> missing something?

The restriction is that you can't use them as relations.

'and and and' is only unambiguous because the middle and MUST be a 
boolean, not a relation.  Hence the first and last 'and's must be terms.