Hi Arthur,
I guess the underlying issue is that SPARQL has no formal notion of pre-bound
variables. In SPIN templates (and many other real-world applications), those
pre-bound variables are very convenient and powerful, but without this concept,
having a variable as graph URI does not make sense, because the SPARQL queries
would not be self-contained.
I have no plans to move SPIN beyond what ARQ (Jena's SPARQL engine) is able to
parse as this would have a lot of undesired implications. Maybe a future SPARQL
version adds a proper concept for pre-bound variables. I will try to follow up
on this topic elsewhere, but in the meantime I am not aware of work-arounds for
your use case.
Thanks,
Holger
On Apr 20, 2010, at 2:47 AM, Arthur Keen wrote:
> The SPARQL form: INSERT INTO <graph> does not allow a variable for the graph
> so something like INSERT INTO ?graph{...} WHERE GRAPH ?graph{...} is not
> valid SPARQL.
> I tried to get around this constraint by parametrizing the query in a spin
> template so that I could create valid queries from the template by passing in
> a parameter sp:arg1 for the graph into the template, e.g., INSERT INTO
> ?arg1{...} WHERE..., but the syntax checker on the SPIN Template will not let
> it through. Is this the way to do this or is there some other way?
>
> Arthur
>
>
>
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