> This should only be used against a CG since it will cause it to load
> the default graph ( "context" ). If you are dispatching SPARQL, you
> should either do it against a CG or use a GRAPH name / variable in the
> expression (perhaps with a topLevel binding of the graphs identifier:
> g.query(..query..,initBindings={Variable('graphName') : g.identifier
> }).
I think saying graph.query(somequery) explicitly says "I want to query this
graph", and no ids should be necessary (note... this is what seems to be
going on) so though I accept that passing in the initBinding would work, why
are you making me do that? And why should CG and Graph act differently here
(and why should I have to care?)
SPARQL queries are dispatched against RDF datasets, which are
> composed of 'multiple' RDF graphs.
hmmm... I picked that up from the crazy conditional blocks in
rdflib.sparql.Algebra.TopEvaluate (speaking of which, shouldn't we be
following http://www.python.org/dev/peps/pep-0008/?)
would the determination of dataset be something that should happen outside
of the graph API?
the fact that a query can call in other resources beyond the graph makes me
sort of feel like a more explicit api would be something like this:
from rdflib import sparql
... set up a list of graph and resource, etc
sparql.query(myquery, data=list_of_graphs_or_resources,
default_graphs='someid')
Otherwhise, it feels like we are conflating graphs and datasets or at least
hiding the actual relationship (and leading to nasty surprises).
If my graph is ided as "http://myns/dataname";, I expect FROM to use that if
my graph is ided "http://myns/dataname"; as it, not attempt to download some
web resource (what currently happens). Sparql seems to default sensibly the
graph the query dispatched from, but not recognize the id of that default
graph.
-w
| david "whit" morriss
|
| contact :: http://public.xdi.org/=whit
"If you don't know where you are,
you don't know anything at all"
Dr. Edgar Spencer, Ph.D., 1995
"I like to write code like
other ppl like to tune their
cars or 10kW hifi equipment..."
Christian Heimes, 2004
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