Abstract Due to the growing importance of alignment, compliance and manageability issues, increased attention is being paid to architectures and architecture management recently. A holistic approach to enterprise architecture requires business related and information systems related artifacts to be equally treated. This paper describes the extension of an existing approach to enterprise architecture and its implementation using a commercial metamodeling platform. In addition to the approach metamodels in general, special attention is paid to the linkages between different architecture layers, both in the underlying model and in its implementation.