The optional AccessRestrictions Attribute specifies the AccessRestrictions that apply to a Node. Its data type is defined in 8.56. If a Server supports AccessRestrictions for a particular Namespace it adds the DefaultAccessRestrictions Property to the NamespaceMetadata Object for that Namespace (see Figure 14). If a particular Node in the Namespace needs to override the default value the Server adds the AccessRestrictions Attribute to the Node.

If a Server implements a vendor specific access restriction model for a Namespace, it does not add the DefaultAccessRestrictions Property to the NamespaceMetadata Object.