Is there a serious, complete (i.e. features, APIs, standard compliance, performances, support, documentation, extensions|contributions, etc.), up-to-date, unbiased (I am not. :-)), …

I am looking for a SPARQL 1.1 implementation. Any pointers? Thanks

This web application is about posting different kind of posts to the web application where users can search those posts by a text-based search. Basically a post has following attri …

Hi! I need put in my APP the RDFa triples in things like a JTable or JTree. Because of this, i am trying parse RFDa "not only in String" ! My first trial was with Any23, but is ne …

Hi, does anybody know if Jena supports somehow a multi-user mode on ontologies? The scenario is a collaborative application realised with Jena where users can work on the same ont …

As suggested here, I'm looking into ARQ's option to use Jena assemblers. I've been looking at the documentation, but I can't seem to figure out why @prefix ja: <http://jena.hpl …

Is there some way to set the rdf:id attribute of a node when you use JENA to write it out as rdf/xml? For example when I serialize my ontology I want to generate output similar to …

I am using Jena. Assuming I am given a URI which may or may not have a file extension (.rdf, .owl etc.) what do I do to determine whether I have an rdf file or owl file and hence w …

Hi, I use SDB to upload RDF data described as DOM to MySQL. The follwing code updates Node table but apparently not the Triple Table in the database. Any suggestions? Thanks, Pa …

I'm currently trying to use Jena SDB as a triple store and get very poor triple insert performance. Any help in speeding things up would be appreciated. The situation: I need to …

Could anyone clarify the function "createOntology(URI uri)" in OntModel class for me? If a book's example, it has ModelMaker modelMaker = ModelFatory.createFileModelMaker ("some …

Hi, I have two resources that have the same rdfs:label, and I would like know if I am talking about the same resource. A method to disambiguate is to check if they share the same p …

Did anybody succeed already in using a local RDF store on SQLite and Android?

Hi, Does Jena SDB have built-in inference capability? If it does, can someone tell me how to set it up? We have installed SDB but found it doesn't support inference (e.g. subsumpt …

I'm still using the old RDB backend in a project and want to upgrade now to either SDB or TDB. Which one is better when the application is expecting to be mostly writing/reading/ …