Rethinking "Urban Sociology". Part four: methodology of research in historical, cultural, and interactional approach - Doing territorial research is not only considering what we called base factors (morphology, economy, urban planning) but also many other ones, just like historical documentation and all factors connected with the culture of a place. Lat but not least, we also have to consider the role of social interaction system. This research step is probably the one where the distinction between qualitative and quantitative assumes the highest importance. In particular, it is interesting to study social interactions which favour what we called connective properties; they can be seen as an opportunity of exchange among relational, symbolic and fruition contexts.
Keywords: Challenge opening, connective properties, instrumentation-compensation of signs, constitutional function.