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We revised the use case to move our competency questions to the right place, and then reviewed the results of the work in Protege. There was some confusion remaining in the Securities Listings ontology over the differences between registered and listed securities which we adjusted according to the results we were seeing for common share vs. exchange-specific share. We are still somewhat confused about the relationship between these two things - the common share and the exchange-specific share, and so John will do some research for us for next week.