This paper is concerned with the handling of rhythm in musiccontent processing applications. Keeping this framework inmind, we briefly report on terminology issues and the inter-disciplinary nature of rhythm investigations, we then reviewapproaches to computational modeling of rhythm and rhythmrepresentation schemes. We comment the bottom-up and top-down oriented approaches to computational modeling andthe parallel that some authors make with physiological andcognitive views on rhythm perception. We argue that inves-tigations should be listener-oriented, signal-oriented andapplication-oriented.