Hello, I just wanted to give you a status update on the progress I have been making with the development of the VCL broker and get some feedback on the approach. 1. I have created OWL/RDF ontology for VCL Image. This ontology will be used by the Cloud Broker tool and can be used by any software agent that wishes to interact with VCL. The ontology is available on the public domain at http://ebiquity.umbc.edu/resource/html/id/343/VCL-Image-ontology.
2. While I was able to successfully integrate the user interface with the Joseki server reading test VCL Image data; I have hit a roadblock while integrating it with VCL's MySQL database to read directly from the IMAGE table. The reason is that Joseki will only read data in RDF format and not in SQL format. And so I have to write a script to manually query VCL Database and then create a RDF datastore out of that data which will be queried by the Broker tool. While this approach works, it is not a good design for data integrity and will require me to run this process frequently to synchronize the VCL database with the Cloud broker database . I want to avoid creating a new database that will have to be maintained by VCL Admins. So, now I am changing my approach to use another SPARQL platform called D2RQ (http://d2rq.org) which claims to allow accessing relational databases as virtual read-only RDF graphs. I am hoping I will be able to integrate it with the Cloud broker tool and remove the additional system process of converting VCL data into RDF format . I have also updated this on the JIRA issue for this project. Would love to hear from anyone who has worked with D2RQ . -- regards, Karuna ____________________ Karuna Pande Joshi PhD Candidate, CSEE Dept, UMBC kjos...@umbc.edu, karuna.jo...@umbc.edu