Re: Jena remote dataset and prefix mapping

2016-03-04 Thread Valerio Belcastro
Ok guys thank you all! Sorry but I'm new to Jena and Semantic web applications and I'm trying to figure out how things works. 2016-03-04 11:43 GMT+01:00 Andy Seaborne : > > Is it possible to get prefix mapping from remote graph in Jena? > > I think there is some confusion over a

Re: Problem Fuseki + TDB

2016-03-04 Thread Andy Seaborne
On 04/03/16 10:58, Mikael Pesonen wrote: Hi, I'm just learning to use these tools. I have successfully setup jena-fuseki1-1.1.2 and am able to make SPARQL queries. But for some reason jena-fuseki-2.3.1 does not find data when inserted in TDB. So I am missing something but cannot spot what...

Re: Antw: Re: How to parse a PropertyPath from String? (SSE.parsePath throws Exception)

2016-03-04 Thread Andreas Kahl
Andy, Perfect! Thanks a lot for your help. Andreas >>> Andy Seaborne 04.03.2016 14:47 >>> On 04/03/16 07:22, Andreas Kahl wrote: > [2] Stacktrace: > org.apache.jena.sparql.core.Var$NotAVariableException: Node_variable > (not a Var) found > at

Re: Antw: Re: How to parse a PropertyPath from String? (SSE.parsePath throws Exception)

2016-03-04 Thread Andy Seaborne
On 04/03/16 07:22, Andreas Kahl wrote: [2] Stacktrace: org.apache.jena.sparql.core.Var$NotAVariableException: Node_variable (not a Var) found at org.apache.jena.sparql.core.Var.isVar(Var.java:146) use Var.alloc, not NodeFactory.createVariable. Var is a subclass of Node_variable that adds

Re: SPI DatasetGraph creating Triples/Quads on demand using DatasetGraphInMemory

2016-03-04 Thread Andy Seaborne
On 03/03/16 10:47, Joint wrote: Hi Andy. I implemented the entire SPI at the DatasetGraph and Graph level. It got to the point where I had overridden more methods than not. In addition writes are not supported and contains methods which call find(ANY, ANY, ANY) play havoc with an on demand

Re: SPI DatasetGraph creating Triples/Quads on demand using DatasetGraphInMemory

2016-03-04 Thread Dick Murray
LOL. The perils of a succinct update with no detail! I understand the Jena SPI supports read/writes via transactions and I also know that the wrapper classes provide a best effort for some of the overridden methods which do not always sit well when materializing triples. For example

Problem Fuseki + TDB

2016-03-04 Thread Mikael Pesonen
Hi, I'm just learning to use these tools. I have successfully setup jena-fuseki1-1.1.2 and am able to make SPARQL queries. But for some reason jena-fuseki-2.3.1 does not find data when inserted in TDB. So I am missing something but cannot spot what... Here's the comparison of procedures.

Re: Jena remote dataset and prefix mapping

2016-03-04 Thread Andy Seaborne
> Is it possible to get prefix mapping from remote graph in Jena? I think there is some confusion over a "remote" graph here. With the standard SPARQL protocols, you can either query a remote endpoint or fetch a remote graph - SPARQL Graph Store Protocol (and dataset FWIW). DatasetAccessor