Art. 61 BV; enforcement of out-of-canton civil judgments and evidentiary use in ordinary proceedings; Art. 61 BV is infringed only where a final civil judgment is refused enforcement, not where a foreign judgment is merely relied upon as proof in a new action. If the cantonal court grants effect to a foreign judgment without satisfying the constitutional prerequisites, the defect may lie in substantive or procedural law, but not in Art. 61 BV itself. A concordat binds only acceding cantons; it cannot be invoked against a non-party canton (consid. 1-2).
D. Gegen dieses Urtheil ergriff K. Bruderer den staats rechtlichen Rekurs an das Bundesgericht; er behauptet: