3 Enric Plaza Claudio Baccigalupo 2009 ICCBR'09 Workshop on Reasoning from Experiences on the Web (WebCBR-09) 21/07/2009 The praxis of the users in some particular domain characterizes the Experience Web. In this paper we focus on analyzing  <i><b>usage of musical objects</b></i>, and how the knowledge discovered can be used to design and implement a CBR system. We perform a case study of the <b>Poolcasting </b>CBR system in order to analyze the role of content provided by the praxis of users in the musical domain and the techniques used to acquire the knowledge required by a CBR system in the context of the Experience Web. http://www.comp.rgu.ac.uk/docs/webcbr/