| ### attribute type XDS: The component of an attribute that indicates the class of information given by that attribute. It is an Object Identifier, so it is completely unique. XOM: Any of the various categories into which the client dynamically groups values on the basis of their semantics. It is an integer unique only within the package. Security: The description of the identifiers (such as name and UUID) and semantics (such as encoding type and access control parameters) of instances of this type. ###