Re: [higgins-dev] Sub-contexts

[Joseph Boyle <boyle.joseph@xxxxxxxxx>]

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 There already exists some (perhaps outdated) IdAS CP implementation used XDI endpoint.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 <boyle.joseph@xxxxxxxxx> 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
>> higgins-dev@xxxxxxxxxxx
>> https://dev.eclipse.org/mailman/listinfo/higgins-dev
>> 
> 
>