• Semantic Versioning and OWL Ontologies ·  Monday, September 19th, 2011

    I begin with a bald, if not exactly bold claim: an OWL ontology is like a public API for your data. Better: an OWL ontology is a public, machine-readable contract between producers and consumers about the meaning of data…

  • Stardog Performance: SP2B Benchmark ·  Tuesday, May 31st, 2011

    As you may already know, we’re working hard on Stardog, our upcoming RDF database. It’s presently in closed alpha testing (55 testers), at version 0.5.3, and progressing rapidly. The overriding goals for Stardog, which we’ve repeated often, are:

  • How to Create Business Value with Semantic Tech ·  Wednesday, May 4th, 2011

    I recently tweeted that we build ontologies to create business value. I meant that we build Semantic Technology-based software to empower our customers to create business value (or to create it for them). In reply, a few people said they’d like to hear more…

  • SDQ: Information Integration in the Real World ·  Monday, March 7th, 2011

    The semantic technology sweet spot is information integration; that means (primarily, but not only) evaluating SPARQL queries over a set of distributed, heterogeneous data sources. Such query results should be sound; they can be, optionally, exact or approximative. SDQ is our product that provides this (and more) functionality…

  • Why Expressive Reasoning is Hard ·  Thursday, February 24th, 2011

    As semantic technologies mature, more and more people understand that automated reasoning is hard, but not really why it’s hard. This blog post explains in detail—using a very simple, easy to understand example—why automated reasoning is computationally hard…

  • Stardog Talk at NYC Semweb Meetup ·  Wednesday, January 26th, 2011

    On 3 Feb, I’ll be giving a talk about Stardog at the Semweb Meetup in NYC

  • Invitation to Stardog Beta ·  Monday, January 10th, 2011

    TL;DR? Stardog is a fast, lightweight RDF database. Today we’re announcing limited access to our beta testing program, in preparation for the 1.0 release. If you’re interested in beta-testing Stardog, drop me an email


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