Actually it's not an extension of the xmlStorageSystem API, it's a new namespace that sit's side-by-side with XSS. If one flag in the hosts capabilities is set (flCanHostAccessRestrictions), the host should implement the accessRestrictions namespace.
All comments are moderated before publication. These HTML tags are permitted: <p>, <b>, <i>, <a>, and <blockquote>. This site is protected by reCAPTCHA (for which the Google Privacy Policy and Terms of Service apply).