A bit string representing the supported attributes of the class that is identified by the policyPrcSupportSupportedPrc object. Each bit of this bit mask corresponds to a class attribute, with the most significant bit of the i-th octet of this octet string corresponding to the (8*i - 7)-th attribute, and the least significant bit of the i-th octet corresponding to the (8*i)-th class attribute. Each bit of this bit mask specifies whether or not the corresponding class attribute is currently supported, with a '1' indicating support and a '0' indicating no support. If the value of this bit mask is N bits long and there are more than N class attributes then the bit mask is logically extended with 0's to the required length.