An arbitration agreement by its nature binds only the parties to the contract in which the clause is inserted, so that it cannot be invoked against a third party which remained extraneous to that stipulation, even though it cooperated in the performance of the relationship.
An arbitration clause contained in a given contract does not extend its effects to disputes relating to another contract, even one linked to that allegedly principal contract.
The jurisdiction of the ordinary court is to be affirmed where the debt sued upon arises not from the contract containing the arbitration clause, but from a separate and autonomous professional engagement.