Thanks with the clarification. Is the Sail RDF interface at all accessible from Python, such as via neo4j.py?
Regards, Chris On Thu, Mar 17, 2011 at 10:32 AM, Marko Rodriguez <[email protected]> wrote: > Hi Chris, > >> However, this doesn't technically represent any statements about >> statements (i.e. metadata). How would I add a statement, explaining >> the attribution of each of these statements and the time when they >> were added? For example, if the first statement was "entered-by" a >> specific person on a specific date, I would represent this in RDF >> like: > > Peter's example was just showing you the basics of getting an RDF > store going over Neo4j. He did not get into the complications of > reification (statements about statements). > > You will need to use Sail quad store functionality. This is where you > have named graphs and you can make statements about named graphs. > > Such issues are for an RDF mailing list. However, here is some > specifics in very brief notations so I don't have to type so much: > > a knows b g1 > b likes c g2 > > These are two quads -- spog. You can now make reference to the forth > component called the 'named graph' or 'context.' > > a believes g2 g1 > > Thus, a is asserting that he believes that b likes c. > > This is all possible through Blueprints Sail which is the binding you > can use to easily make Neo4j an RDF quad store. Blueprints Sail just > binds the Sail API to Neo4j. You will not think "Neo4j" in this > context, you will think "Sail." Sail is pretty standard Java-based RDF > API developed by OpenRDF. Thus, you should learn about Sail: > > http://www.openrdf.org/documentation.jsp > > Really fast. To add quads: > > sailConnection.addStatement(new URIImpl(a), new URIImpl(knows), new > URIImpl(b), new URIImpl(g1)); > > To query quads, where null acts as a wildcard: > > sailConnection.getStatements(new URIImpl(a), null, null, null); > > Hope that gets you started. > > Good luck with your project, > Marko. > > http://markorodriguez.com > > > _______________________________________________ > Neo4j mailing list > [email protected] > https://lists.neo4j.org/mailman/listinfo/user > _______________________________________________ Neo4j mailing list [email protected] https://lists.neo4j.org/mailman/listinfo/user
