'default' => array(
            'type'    => 'Zend\Mvc\Router\Http\Segment',
            'options' => array(
                'route'    => '/[:controller[/:action]]',
                'constraints' => array(
                    'controller' => '[a-zA-Z][a-zA-Z0-9_-]*',
                    'action'     => '[a-zA-Z][a-zA-Z0-9_-]*',
                ),
                'defaults' => array(
                    'controller' => 'index',
                    'action'     => 'index',
                ),
        ),
        'child_routes' => array(
            'params' => array(
            'type' => 'Zend\Mvc\Router\Http\Wildcard',
            ... ?
        ),
            ),
        ),