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

From: Alberto Reggiori <alberto@asemantics.com>
Date: Mon, 30 Aug 2004 17:38:56 +0200
Message-Id: <B493CABC-FA9A-11D8-A917-0003939CA324@asemantics.com>
Cc: public-rdf-dawg@w3.org
To: "Seaborne, Andy" <andy.seaborne@hp.com>


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
Received on Monday, 30 August 2004 15:39:00 GMT

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