The Internal Market is one of the success stories of the European Union and to ensure its continuing success the European Commission recently adopted the EU 2020 strategy. The new Digital Agenda for Europe is part of the EU 2020 strategy whose aim is to deliver sustainable economic and social benefits from a digital single market. And to achieve the digital single market all public administrations across Europe have to work together for its citizens and businesses, in other words the systems of the different public administrations, from electronic identity to public procurement, have to be interoperable.