In the e-government research community as well as in many national e-government programs, interoperability is widely seen as a key factor in developing effective and attractive e-services. There is also agreement that interoperability encompasses not only mere technical standards and interfaces, but also includes organizational, legal, and cultural aspects. Several interoperability frameworks have been introduced on national and international levels, and recommendations have been made for the adaptation of enterprise architectures in the public sector.

Common to all these approaches...