Semantic Data Exchange (SDX) was an investigation project looking at the role of information intermediaries for government linked data. This was a project funded by TSB (Technology Strategy Board). The work on SDX led to, supported and eventually exploited the Linked Data API we jointly developed with Jeni Tennison and Leigh Dodds.
We gave a brief presentation on the study at the “Collaboration Nation – Digital Britain” event in March 2010. Here are the slides from that: