Re: [namedgraphs] A beginner's question

[Jennifer C. <jen...@at...>]

Hi John,

 

The short answer is, no, as far as I know, that's not supported.

 

This came up briefly on the mailing list earlier this year:

 

On Tue, 12 Jan 2010, Jennifer Cormier wrote:

> I remember looking into the "named graphs" feature of the Jena TDB 

> release last year.  Based on what I recall, it was quite different 

> from NG4J's implementation.  Individual graphs are stored separately 

> and must be loaded individually.

> 

> In the NG4J implementation, a quad store is used so that each triple 

> is associated with a 4th item, that being the graph name.  It is 

> possible to search using SPARQL over an entire dataset, across graphs, 

> and get only those quads of interest, whether or not they are in the
same graph.

 

I may have misremembered, or misunderstood the details of Jena TBD; I've
never used it, and it's been a while since I looked at the documentation.

 

If it's possible to use them together, I expect it would take some work.
(Unless, e.g., only 1 named graph is being used.) 

 

Getting NG4J to work with a Jena TDB backend (as an alternative to the
databases currently supported by NG4J) is something I'm interested in also
and would be happy to discuss further.  Anyone familiar with Jena TDB?

 

Jennifer

 

 

From: John Ibbotson [mailto:joh...@uk...] 
Sent: Thursday, September 23, 2010 9:56 AM
To: ng4...@li...
Subject: [namedgraphs] A beginner's question

 

I'm interested in using the NG4J API with Jena TDB. Is this supported ? 

Regards,
John

John Ibbotson PhD CEng FIET
Master Inventor
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