New content and service providers emerge every day. Each player offers new software components or services to support their technology. In these multi-vendor environments there is a genuine need for integration and interoperability. Integration and interoperability is a first step, once this is achieved components can seamlessly use services from different providers, and that is when service policies come into play. A policy mechanism allows fine grained control over the service usage. The OSGi Service Platform allows seamless integration of components and services but lacks a well defined mechanism for dynamic service policy management. Two approaches are presented for enhancing the OSGi Service Platform with policies. The first approach extends the platform while the second one adapts the plug-in components. Finally they are compared and evaluated against multiple requirements; usability, performance, transparency and backward compatibility.

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The growing device diversity and anywhere/anytime nature of internet access calls for a new way of engineering web applications. These new paradigms introduce the need for context-awareness and personalization. In this paper we give the basis for two methods that can be used to bring web applications to almost every device and customise an application to the browsing user's profile and his device. We also present the basic design of a platform that interferes in the different layers of a web application and uses a modular approach and reflection as the basis for ubiquitous web applications.

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