[Versa] Versa issue: subgraph primitives?

[Michael Olson]

>
>> As for the context-switching syntax, I'm also trying to imagine how
>> that would work.  It would definately (if all the kinks are ironed
>> out) be a incredible performance tuning tool for context-aware RDF
>> datastores.  I would be inclined to move this to a seperate host
>> language as well, as long as it was as concise and accessible enough
>> so I wouldn't have to do what I had been doing before (rely heavily on
>> scope and scoped-subquery) to do that kind of thing.
>
> I'm fine with that.  I don't like the proposed { context } query,
> because I think it's a bit of a hacked special case.  I'd prefer to be
> sure we have a more general solution, or just leave it out of Versa
> altogether.
>

By a more general solution do you mean be able to extends it to  
eventually do more then just scoping sub graphs?

@prefix foo=foo.com
@variable bar= some query
@subgraph some query that will scope the next query
@logging = on
@some an extension declaration possible?
and lastly the query


Is this what you had in mind?


> FWIW, I definitely agree that a default host would be best as text,
> which meets your "concise and accessible" test.

I agree as well.

>
>
> --  
> Uche Ogbuji                               Fourthought, Inc.
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Mike Olson                                                Principal  
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