I might be wrong but I thinkg the Jena TDB store will be able to
perform multiple named graphs queries much more efficiently if all the
graphs involved by the query belong to the same TDB store rather that
going through a generic indirection involving a generic wrapper. Would
be worth checking that claim by reading the jena source code though.
True.
My assumption is, that a query cannot be forwarded to TDB if the
graphs do not all belong to the same TDB store, so that 466 cannot be
resolved without the changes described in 467. We will see...
ARQ also can query across a dataset made up of graphs backed by
different storage subsystems. It's not as efficient as all in one TDB
store though.
Andy
