Kernrechtsfrage
Whether the forum clause in the 1996 addendum validly waived the appellant's domicile forum under Art. 30(2) BV.
Extrahierter Entscheid
Yes. The clause was an express, unambiguous waiver and, construed in context, covered the whole contractual complex.
Extrahierte Begründung
The addenda concerned the implementation of the original 1994 project and only modified the mode of performance. In good faith, the clause could only be understood as selecting Basel for disputes arising from the entire EDV project.