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The development of complex distributed systems demands for the creation of suitable architectural styles (or paradigms) and related run-time infrastructures. An emerging style that is receiving increasing attention is based on the notion of event. In an event-based architecture, distributed software components interact by generating and consuming events. An(More)
The development of complex distributed systems demands for the creation of suitable architectural styles (or paradigms) and related run-time infrastructures. An emerging style that is receiving increasing attention is based on the notion of event. In an event-based architecture, distributed software components interact by generating and consuming events.(More)
A fundamental problem in software p r o c esses is how the intrinsic rigidity of a predened (formal) model can be r e c-onciled with the need for exibility, change, and evolution. We therefore distinguish between software p r o c esses, as spec-ied i n a p r o c ess description, and their actual performance by humans. Further, we claim that the two(More)
Service compositions are created by exploiting existing component services that are, in general, out of the control of the composition developer. The challenge nowadays is to make such compositions able to dynamically reconfigure themselves in order to address the cases when the component services do not behave as expected and when the execution context(More)
In the recent past, a relevant effort has been devoted to the definition of process modeling languages (PMLs). The resulting languages and environments -although technically successful-did not receive much attention from industry. On the contrary, researchers and practitioners have recently started experimenting with the usage of UML as a PML. Being so(More)
The diffusion of service-oriented computing is today heavily influencing many software development and research activities. Despite this, service-oriented computing is a relatively new field, where many aspects still suffer from a lack of standardization. Also, the service-oriented approach is bringing together researchers from different communities or from(More)