Characterising the flow or transfer of knowledge in knowledge creating open online communities. Knowledge building as creation of epistemic artefacts shared in a community. Lots of actors, lots of artefacts with induced relationships. given a graph of dependencies between knowledge items, how to identify the main pathways of the evolution of knowledge? use references (citation links) between publications. Main Path Analysis approach to understand how often different paths or routes are used.
Very technical discussion, mostly going over my head after about 10 mins. Note to self, concentrate harder, it is a best paper nomination after all.