Monthly Archives: May 2006

SquirrelRDF is quite similar to our D2RQ. There’s a lot of data out there, but much is not in RDF, but in databases. SquirrelRDF allows SPARQL queries against databases. Mapping from DB schema to RDF is done along the lines … Continue reading →

People have been talking about federated semantic web queries for a while. Here’s a working prototype … Bastian is an intern at HP Labs. The idea is to answer one SPARQL query using data from multiple SPARQL endpoints. The individual … Continue reading →

Semanlink is an RDF-based personal information management system. It’s a tagging system. You can tag files, bookmarks and text notes. Unlike most tagging systems, Semanlink lets you arrange tags into a concept hierarchy. It runs as a servlet. There’s a … Continue reading →

Eyeball is a command-line tool for finding typical problems in RDF files. A “lint for RDF.” Or the “jena rdf screwup detection utility,” in danbri’s words. Some of the errors that Eyeball can detect: datatypes errors (integers with letters in … Continue reading →

Steve wants to translate XML into RDF, and back. He tried to come up with the simplest possible mapping. And he hates inventing new languages. So he didn’t want to create a mapping language. The solution is to look at … Continue reading →

Slug is one of Leigh’s pet projects. It’s a crawler for the semantic web. There are lots of slug photos in the slides. A semantic web crawler works like a web crawler, but it fetches RDF files instead of HTML … Continue reading →

PortalCore is a web-pased portal toolkit that provides faceted browsing on RDF data. It was built at HP Labs and used in various customer projects. Unlike Longwell, which also provides faceted browsing of RDF datasets, PortalCore is highly configurable. Which … Continue reading →

RDFReactor generates Java objects from RDF schemas. This makes RDF much easier to use for the 90% of Java developers who are not RDF experts. It’s hard to see the actual domain objects between all the triples. RDFReactor is like … Continue reading →

Ginseng is a natural language query facility for RDF. The inspiration is “fridge poetry for the Semantic Web.” (a great tagline!) “The markup prisoner’s dilemma” – why should I do markup if there are no tools making use of it, … Continue reading →

I’m at the Jena User Conference in Bristol. For me, this is a return to the place where I lived and worked for half a year in 2005, and I’m catching up with a lot of folks I haven’t seen … Continue reading →