This attribute is an
indicator that the element contains a security-related notice and is used to
categorize which of the required notices is specified in the element. These
categories include those described in the CAPCO Register, as well as additional
well-defined and formally recognized security notice types described in other
directives, such as US-Person and DoD Distribution. The element could contain
any structure that the implementing schema defines, and details of the rendering
would be relegated to the implementing schema. The permissible value for this
attribute are defined in the Controlled Value Enumeration: CVEnumISMNotice.xml