> Date: Wed, 22 Dec 2004 14:45:20 -0500
> From: Eric Lease Morgan <[log in to unmask]>
>
> > I've noticed that the cql-java implementation tosses an exception if I
> > try
> > to parse:
> >
> >         foo bar
> >
> > Exception in thread "main" org.z3950.zing.cql.CQLParseException:
> > unknown
> > first-class relation: bar
> >
> > I just wanted to confirm that an unquoted sequence of terms is indeed
> > invalid CQL.

Yes, this is invalid.  In CQL 1.0 (which is what CQL-Java implements),
it was invalid for the reason diagnosed here, namely that "bar" was an
invalid relation.  In CQL 1.1, any word can function as a relation
[which I think is a mistake, but that's a different discussion for
another day], but the query "foo bar" is still illegal CQL 1.1,
because it's interpreted as index-name "foo", relation "bar" and then
no actual search-term.

> Yep, but I'm not really sure the query, foo bar, really is invalid.
> According to the Gentle Introduction to CQL:
>
>    In general, multi-word terms are interpreted as requesting
>    records in which a single field contains all the specified
>    words, in the specified order, with no other words in
>    between. This is a proximity search. But see the section
>    below on relations for exceptions.

This referes to a multi-word term as opposed to a sequence of
single-word terms.  That is, it describes how to interpret
        "foo bar"
rather than
        foo bar

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