Also consider SPIN from TopQuadrant. SPIN can represent SPARQL as RDF.
There is a vocabulary and API:
http://spinrdf.org/spin.html
http://topbraid.org/spin/api/
Martynas
graphityhq.com
On Fri, Aug 2, 2013 at 10:55 AM, Amin beyranvand <amin_2...@yahoo.com> wrote:
>
>
> Hi
>
> I want to write an engine for processing SPARQL queries. i want to use jena
> to parse SPARQL queries and convert them to a internal form for my
> application. i can parse queries and convert them to query algebra using this
> code:
>
> Query q=QueryFactory.create("select ?s ?o where {?s ?p ?o }");
> Op op = Algebra.compile(q) ;
>
> but i don't know how to use op and what is the uses of op.visit(opVisitor) .
>
> in more detail: i want to convert query to a left deep tree and then process
> query operators in a pipelined manner.
