> > Allow me to repeat the grammar in used by parsers and semantics for
> it:
> > search-clause ::= ">" [identifier "="] term cql-query


> Does this produce unambiguous cql?
>  >dc1="core-v1"  dc1.title=first and dc1.title=second

> Is the second dc1 governed by the first assignment?  If so, is that
> because the first assignment is "global" (and if so how do we know that)
> or because it is the most recent assignment for dc1?

Yes and no, respectively, as I understand it:

It does apply to both because the bracketing is implicitly:
  > dc1="core1" (dc1.title = first and dc1.title=second)

So if you have multiple prefixes:
  >dc1=foo ( >dc2=foo2 ( >dc3=foo3 ( cql.resultsetname="fish" )))


Ray:
> How about:
>  >dc1="core-v1"  dc1.title=first and >dc1="core-v1a" dc1.title=second
> and dc1.title=third

Lets remove the mappings and put in the parens:

((dc1.title=first and dc1.title=second) and dc1.title=third)

And put back the mappings:

>dc1=v1 ((dc1.title=first and >dc1=v1a dc1.title=second) and
          dc1.title=third)


> The third occurence of dc1 -- is it governed by the first or second
> assignment?

First, due to the left to right ordering of parens.

Rob
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