def METHOD_NAME(self) -> dict[str, Any]:
    """
    Create the base context derived from the dynamic service configuration.
    """
    # the referentienummer may be overridden later on!
    referentienummer = uuid.uuid4()
    return {
        "soap_version": self.service.soap_service.soap_version,
        # context for security tag
        "service": self.service,
        "security_expires_minutes": self.soap_security_expires_minutes,
        # meta-information
        "referentienummer": referentienummer,
    }