On the composition of digital licenses in collaborative environments

In the era of Web 2.0, users are not any longer just consumers of resources but they can actively produce, share and modify content, by composing and enhancing digital resources and services. In this context, the intellectual property of the users collaborating in authoring activities should be preserved. Starting from a model for digital licences generation and management useful in collaborative environments like the Web 2.0, in this paper we propose the algorithms of a DRM component responsible for the composition and modification of digital resources and the generation of the related licenses. Then, the paper presents a compliant architecture based on a composition of web services.