Re: another problem with Proposal B from james anderson on 2017-04-13 (public-sparql-exists@w3.org from April 2017)

From: james anderson <james@dydra.com>
Date: Thu, 13 Apr 2017 21:04:55 +0000
To: public-sparql-exists@w3.org
Message-ID: <0102015b69221d1d-46ce1915-f4f3-4f43-9a10-404339874919-000000@eu-west-1.amazonse>

good evening;

> On 2017-04-13, at 21:50, Peter F. Patel-Schneider <pfpschneider@gmail.com> wrote:
> 
> […] This removes the
> initial empty BGP in many group graph patterns, including
>  { VALUES ?junk { } BIND ( ?this AS ?that ) ?that a ex:bad . }
> resulting in
>  Join( Extend( empty multiset, ?that, ?this ), BGP( ?that a ex:bad ) )

are these the same with respect to “Z” and simplification?

     { VALUES ?junk { } BIND ( ?this AS ?that ) ?that a ex:bad . }

and

     { { } BIND ( ?this AS ?that ) ?that a ex:bad . }

best regards, from berlin,

Received on Thursday, 13 April 2017 21:05:29 UTC