... I.e. no unique-name-assumption ... For this you need Pellet or similar. The Jena rule reasoner is limited to OWL lite syntax (with OWL full semantics) - it...
I have today converted the Jena 2.6.2 libraries successfully to a .NET assembly. Referencing in Visual Studio 2010 appears to expose the "jena" namespace fine...
43823
Paolo Castagna
castagna.lists@...
May 1, 2010 4:12 pm
Hi Mark, thanks for reporting back to us. One thing to do, if at all possible, would be to run the Jena test suite and see if there are tests failing. However,...
Hi, I have built a test application in C# to run the test framework that is normally executed by the test.bat program in the root Jena directory. I have used...
... 33x slow down is unusuable, hadn't previously heard of such a hit with IKVM. ... There are only actually a few problem cases in there: o The two failures...
Hi Dave. An update. I have fixed all issues, they were simply compound errors of the IKVM JDBC assembly not being present in the application path. This...
Hello all, I am Alia B. a Researcher at King AdulAziz City for Science and technology, Saudi Arabia I started learning about the semantic web technology And I...
... Welcome. ... What's the question? ... The Jena homepage http://jena.sourceforge.net/documentation.html includes tutorials for the basic API and SPARQL plus...
Hello All, I have created a SPARQL query to select resources and I want to create java swing GUI to allow users to choose resource and specifies their own...
43830
Paolo Castagna
castagna.lists@...
May 2, 2010 1:00 pm
... Hi Sonny, please, read: http://jena.sourceforge.net/ARQ/app_api.html Paolo...
Hi Andy, Thanks for the reply. Yes, you are right that the domian of TechniqueID is a union of SurveyTechnique or SurveyInfo. So what can I do to get...
I won't have time to follow up on this over the next few days, however my initial removal of any buffered output did have any performance impact. Jeroen...
I had exactly the same issue. I was using joseki to load rdfs in to TDB. Having multiple simultaneous requests to joseki ruins the db and produces the...
43836
Whitley, Zachary C.
zachary.whitley@...
May 3, 2010 1:48 pm
I'm getting a 404 on http://jena.sourceforge.net/vocabularies/assembler.n3 The file is referenced in the assembler howto at...
... All the RDF/SPARQL funtionallity is wrapped into a library which uses Jena 2.6.2, ARQ 2.8.3 and TDB 0.8.5. The test case then opens several reading and...
... Ok, now I've rewritten my testcase, to only do simple read/write operations directly on a TDB model, without using our lib. The test runs fine now, so I...
... Yes. A good tactic is to print the RDF out in a format that clearly shows the triple structure such as Turtle or N-triples. This will show you how RDF is...
Hi everyone, Is it possible to do a query that uses one of ARQ extensions (aggregate, group by, etc..) over any endpoint? Or is it necessary that that...
... The extensions are not in general simple transformable to SPARQL 1.0. You'll have to check each endpoint as to what it offers because theer are some...
Hello again, I'm trying to understand the Jena performance concerning cardinality restrictions on OWL and validation on the model, and I have a few questions...
Has anyone seen this error before? [5/3/10 15:24:11:946 PDT] 0000002a SystemErr R Caused by: com.hp.hpl.jena.tdb.base.block.BlockException: File size...
43844
Paolo Castagna
castagna.lists@...
May 4, 2010 6:35 am
... Are you using a Multiple Reader or Single Writer (MRSW) policy for concurrency access? See: - http://openjena.org/wiki/TDB/JavaAPI#Concurrency ...
... All the cases of this I have seen, or that have been reported in sufficient detail to diagnose the issue have been with not sticking to the Multiple Reader...
... This is indeed an impossible block size (file sizes for a block file are a multiple of 8K or 8M on a 64-bit JVM - you appear to be on a 64bit JVM). Is this...
... My experience with mysterious long delays in running the test suite (on Linux) is that something somewhere is waiting for a network timeout. Or lots of...
Hi Andy, Thanks for the reply again. I am not getting your point.Let me explain my aim. My aim is just to extract all the properties (Datatype and Object) and...
I think Multiple Reader or Single Writer policy violation is what corrupts TDB. Though it is strange that Joseki allows that kind of violation. To solve my...
... No. The reason is that a "relevant class" can be an arbitrarily complicated class expression hidden behind a bnode. (If the complicated class expression...
