text: There are a number of vendors emerging who are using the technology in very productive ways and are 
  providing the foundation for federated knowledge graphs that can scale to hundreds of millions of triples 
  or more and provide a framework for all corporate data. I’ve listed several in the bibliography but those 
  are only the ones I’ve had some experience with. I’m sure there are many others. One of the products I’ve 
  had the best experience with is the AllegroGraph triplestore and the Gruff visualization tool from Franz 
  Inc. Although Allegro is a commercial tool, the free version supports most of the core capabilities of the 
  commercial version. I’ve found the Allegro triplestore easy to use on a Windows PC with the Docker tool 
  to emulate a Linux server. 
  
  I first started working with classification-based languages when I worked at the Information Sciences 
  Institute (ISI) and used the Loom language [Macgregor 91] to develop B2B systems for the US 
  Department of Defense and their contractors. Since then, I’ve followed the progress of the technology, 
  especially the DARPA knowledge sharing initiative [Neches 91] and always thought there was great 
  promise in the technology. When I first discovered Protégé it was a great experience. It is one of the best 
  supported and most usable free tools I’ve ever seen, and it always surprised me that there weren’t more 
  corporate users leveraging it in major ways. I think we are finally starting to see this happen and I hope 
  this tutorial helps in a small way to accelerate the adoption of this powerful and robust tool. 