This has some good discussion and links both in the post and comments: http://decentralyze.com/2010/03/09/rdf-meets-nosql/
One point made is that SPARQL doesn't express the full range of queries you can do in a graph db. Has it been a good match for the kind of queries we do in Higgins? On Jun 10, 2010, at 8:38 AM, Sergey Lyakhov wrote: > Joseph, > >> Are you saying that integrating any graph database will take the same 2-3 >> weeks of effort? >> >> - NG4J >> - Other RDF quad stores > Suppose yes. Also, I have to note that there is a modification of SPARQL to > query quards (we use SPARQL to query data from CP). Suppose, there possible > some incompatibility problems between triple- and quard-based CPs. > >> - Graph databases not specialized in RDF, like Neo4j, InfoGrid, etc. > Suppose yes for Neo4j, AllegroGraph, Boca. What about InfoGrid, HyperGraphDB > - as I understand, they does not support RDFS/SPARQL. As a result, for these > DBs we can implement CP with no query support. > >> - Higgins XDI endpoint > There already exists some (perhaps outdated) IdAS CP implementation used XDI > endpoint. > >> Also if we integrate two or more - would that be like 2-3 weeks each, or >> some smaller increment like 1-2 weeks per >> additional database provider? > > Yes, suppose we need to implement base CP with data providers support. > Actually, the current Jena CP can be easily refactored in such a way. > > Thanks, > Sergey Lyakhov > > On Tue, 8 Jun 2010 10:49:01 -0700 > Joseph Boyle <[email protected]> wrote: > >> >> On Jun 8, 2010, at 10:34 AM, Sergey Lyakhov wrote: >>> Actually, I suppose it should take about 2-3 weeks to implement proposed >>> NG4J CP. But I suppse we need to harmonize >>> all architectural questions (authentication, access control, schema/model >>> context, metadata, etc) before. Also, my >>> comments are related to the whole idea about using named graph (subcontext) >>> for metadata on attribute. Not only >>> NG4J can be used to implement it. Neo4J, Infogrid, etc., can be used in the >>> same way too. >> >> Sergey, >> >> Are you saying that integrating any graph database will take the same 2-3 >> weeks of effort? >> >> - NG4J >> - Other RDF quad stores >> - Graph databases not specialized in RDF, like Neo4j, InfoGrid, etc. >> - Higgins XDI endpoint >> >> Also if we integrate two or more - would that be like 2-3 weeks each, or >> some smaller increment like 1-2 weeks per >> additional database provider? >> >> Thanks, Joseph_______________________________________________ >> higgins-dev mailing list >> [email protected] >> https://dev.eclipse.org/mailman/listinfo/higgins-dev >> > > _______________________________________________ higgins-dev mailing list [email protected] https://dev.eclipse.org/mailman/listinfo/higgins-dev
