RE: UNSAID vs MINUS

> (I reorganised the page end of Friday - didn't remove any text intentionally but I put the two options in separate sections.  I generally called it NOT EXISTS.)

Thanks!

> To make progress on this, let's take it in two steps.
> 
> 1/ Decide on UNSAID vs Set-MINUS, that is resolve to explore one design in depth
> 
> 2/ Then take as a sub-issue of NOT EXISTS as to have a graph operator and/or a FILTER expression.
> 
> I propose we adopt the UNSAID/NOT EXISTS design.  The Set-MINUS seems to have no advantages because it is equivalent to an NOT EXISTS form, but requires each side to be a set, which would need to be worked through the rest of the language.

Full ack.

> On the second part, I found it to be no more work as the graph operator is the introduction of  algebra-level filter.

I also agree. The only thing I do not like about this is full SPARQL
syntax in FILTERs. It makes thinks hard to read. BUt I guess that is
acceptable.

Best regards
Simon

-- 
Simon Schenk | ISWeb | Uni Koblenz
http://isweb.uni-koblenz.de
http://www.uni-koblenz.de/~sschenk
Five sentences policy: http://five.sentenc.es/