+ 'tunnel_access_PIF_of': (lambda x, p, t, v: _strlist_to_xml(x, p, 'tunnel_access_PIF_of', 'pif', v),
+ lambda n: _strlist_from_xml(n, 'tunnel_access_PIF_of', 'pif')),
+ 'tunnel_transport_PIF_of': (lambda x, p, t, v: _strlist_to_xml(x, p, 'tunnel_transport_PIF_of', 'pif', v),
+ lambda n: _strlist_from_xml(n, 'tunnel_transport_PIF_of', 'pif')),