When I'm working with a public SPARQL endpoint and get unexpected behaviour, I'm frequently not sure if I'm doing something wrong, or the endpoint is faulty (most of the time it is …

Named Graphs have thus far served a very useful purpose (esp. in SPARQL) for supporting notions of provenance into systems which want to store and track data from multiple sources. …

I have a long standing problem with being able to use modern OWL / RDF editors (such as Protege and Top Braid Composer, primarily) to manage OWL or RDF documents that rely on relat …

Are there any generic graph based graphical viewers of RDF data that query and retrieve result sets via SPARQL endpoints? I'm thinking something like Gruff but not limited to an A …

My current project requires the integration of an aggregation platform and RDF triple store for semantic indexing and graphing. Given that Drupal 7 has RDF in its core and it is a …

Hi, I am looking for a library that can generate Java classes from a given RDF ontology. (question asked previously here). I have found tools such as RDFReactor and RDF2Java, but …

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 …

Hello, I have a problem with importing owl files using owl api in Java. I successfully can import 2 owl files. However, a problem occurs, when I try to import 3 or more owl files t …

I'm using ARC2 php library to import RDF files that contains user profiles (foaf represented) into a store. Fortuenately, facebook unleashed their data via Open Graph protocol whic …

Hi there, I'd like to convert vcard xmlrdf docs (fetched using any23) to their corresponding triples in foaf/doac. Is this doable? Thanks in advance.

Despite the fact that the RDFa in XHTML: Syntax and Processing refers to a blogger.com profile, I have not found a template for my blog that is XHTML+RDFa compatible. So, I can ent …

If I import SKOS-XL in a IDE using the OWL API such as Neon-Toolkit and Protégé I do get a completely different user experience than in an IDE based on Jena. The details are descr …

I am experimenting with the OWL-API and I am looking for a way to create classes and properties without actually going through creating the subclass/ClassAssertion and Property ass …

Hi, Have you had any experiences with the JADEOWLCodec? I've tried using it in a multi-agent project but ran into some problems. Now I'm trying to dig deeper into the source code, …

Hi all, I have written a tool that performs a GRDDL-based translation to OWL using an XMI input file (code generated by modeling tool). I am eager to hear your opinion on the foll …