Re: Syntax (was: RE: do we need INSERT?)

On Aug 27, 2004, at 6:49 PM, Seaborne, Andy wrote:

>
> Summary: the choice is bewteen:
>
> 1/ Separate constraints and triple patterns.  Can use (parentheses) for
> both.

+1

>
> 2/ Allow constraints and triple patterns to be mixed.  Need to 
> differentiate
> grouping symbols.
>
> Testcase:
> A nested graph pattern (( (?x :y ?z) (?x :y1 ?z1 ))
> A nested constraint    (( (?z < 2 ) ))
>
> This requires arbitrary lookahead to distinguish.

but I would like to further check how existing SQL yacc parsers handle 
this nested parenthesis lookahead issue....


Alberto