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Service composition tools are usually based on an input/output mapping pattern. Inputs and output are declared by the service developer when publishing his service. However, services might also generate unstructured data such as email and instant messages content. That data are hardly expectable by developers. Consequently, much data are unavoidably left out by current service composition tools. In this paper we firstly propose and implement an enhancement to current SOA in order to facilitate capturing unstructured data. Secondly, we define and implement a new service composition pattern and tool in order to enable end-users to easily create Mashups based on structured and unstructured data (unstructured data are neither declared nor formatted by the service developer when publishing services). Finally, we validate this proposal by creating a rich communication environment using the composition tool we have implemented. As a consequence, this work impacts significantly service composition research communities by introducing a novel architecture and a new pattern for composing services.