Hi Jerven,
On 16/04/2013 20:51, Jerven Bolleman wrote:
Hi Aidan,
I think that you are jumping to conclusions. While a RDF store that can hold
any RDF data will answer queries
in P-Space, however that is an extremely generic solution. There is no need
that a fully SPARQL1.1 query compliant engine needs to hold
true to this [1].
> <snip>
Absolutely. Very rarely will SPARQL run into "P-Space cases". And yes,
we can define subsets of SPARQL that scale and cases where SPARQL cannot
perform joins and so forth, but then, very simply, it's not SPARQL. It
is something else. It is a subset of SPARQL.
In summary:
* "SPARQL scales in some cases" = vague, but okay
* "SPARQL scales" = not okay
The credo that SPARQL does not scale in comparison to restpark does not hold
true because restpark cannot answer queries that SPARQL endpoints could.
But this is *precisely* the reason why it does hold true! :) SPARQL does
not scale in comparison to Restpark because (and only because) SPARQL is
a complex language and Restpark is a simple language.
Not competing in most of the performance race is not the same as winning the
race ;)
Who said anything about a race. :)
Cheers,
Aidan
