Documentation for class permission (inherits from generic_acl):

name	type	default	params	representant	foreign	foreign_prop	position
id	CO_INTEGER	SEQUENCE	READONLY=1;HIDDEN=1	0			0
version	CO_INTEGER	0	READONLY=1;HIDDEN=1	0			0
deleted	CO_INTEGER	0	READONLY=1;HIDDEN=1	0			0
name	CO_STRING	''		1			200