CumulusRDF 0.5.2

[Andreas Harth]

Hi,

we've upgraded to a new version of Cassandra (1.1.0) and Hector
(1.0.6-SNAPSHOT) and did a few small cleanups in the code.

The archive with the new CumulusRDF version 0.5.2 is now online [1].

Best regards,
Andreas.

[1] http://cumulusrdf.googlecode.com/files/cumulusrdf-0.5.2.zip

[Vladimir Mironov]

Hi Andreas,

does this version support SPARQL?

Regards,

Vladimir

[Andreas Harth]

Hi Vladimir,

On 26/04/12 19:06, Vladimir Mironov wrote:
> does this version support SPARQL?

we're currently working on a version that uses the
Sesame query processor to provide SPARQL functionality.

However, please note that there are no optimisations,
so queries will be slow-ish. One might say that adding
joins to a key-value store defeats the purpose.

In any case, there's a few minor things to fix; the
version should be out as 0.5.3 in the next few days.

Best regards,
Andreas.

[Vladimir Mironov]

Hi Andreas,

I, and likely many others, would be interested to test Cumulus when a SPARQL interface (Sesame or whichever) is implemented.

Please post a notice to this mail list.

Cheers,

Vladimir

[Andreas Harth]

Hi Vladimir,

On 27/04/12 10:08, Vladimir Mironov wrote:
> I, and likely many others, would be interested to test Cumulus when a
> SPARQL interface (Sesame or whichever) is implemented.
> Please post a notice to this mail list.

I've put a 0.6.0 ZIP archive online which contains SPARQL support.

Let us know how it goes.

Cheers,
Andreas.

[Vladimir Mironov]

Hi Andreas,

I'm a bit confused about the situation with quads in Cumulus.

I've understood I need to use a special file format for loading quads -  *.nq. 

Is this correct? Where is the format described?

In the Roadmap I see:

Store quads instead of triples (probably not with six full indices)

How soon will this be implemented?

Regards,

Vladimir

[Andreas Harth]

Hi,

On 30/05/12 13:12, Vladimir Mironov wrote:
> I'm a bit confused about the situation with quads in Cumulus.
> I've understood I need to use a special file format for loading quads -
> *.nq.
> Is this correct? Where is the format described?

here you go [1].

> In the Roadmap I see:
> Store quads instead of triples (probably not with six full indices)
> How soon will this be implemented?

We currently only support a C->SPO lookup. Full support for quads
in the index is on the roadmap but we don't have an ETA yet.

Best regards,
Andreas.

[1] http://sw.deri.org/2008/07/n-quads/