8. The method of claim 7 , wherein the at least one privilege supported by the node object corresponding to the document data object comprises anyone or any combination of: a privilege of viewing an attribute of the node object, a privilege of viewing a name of the node object, a privilege of modifying the name of the node object, a privilege of modifying the attribute of the node object, a privilege of granting the privilege on the node object to another role, a privilege of re-licensing the privilege on the node object to another role, a privilege of bereaving a privilege of another role on the node object, a privilege of view privilege granted on the node object, a privilege of printing information of the node object, a privilege of downloading a source file corresponding to the node object, a privilege of deleting a node object, a privilege of creating a sub-node of the node object, and a privilege of deleting a sub-node of the node object.
8. The method of claim 7 , wherein the at least one privilege supported by the node object corresponding to the document data object comprises anyone or any combination of: a privilege of viewing an attribute of the node object, a privilege of viewing a name of the node object, a privilege of modifying the name of the node object, a privilege of modifying the attribute of the node object, a privilege of granting the privilege on the node object to another role, a privilege of re-licensing the privilege on the node object to another role, a privilege of bereaving a privilege of another role on the node object, a privilege of view privilege granted on the node object, a privilege of printing information of the node object, a privilege of downloading a source file corresponding to the node object, a privilege of deleting a node object, a privilege of creating a sub-node of the node object, and a privilege of deleting a sub-node of the node object. 9. The method of claim 8 , wherein if the node object corresponding to the document data object is a document or a page, the at least one privilege supported by the node object corresponding to the document data object further comprises anyone or any combination of: a privilege of reading text corresponding to the node object, a privilege of excerpting characters corresponding to the node object, and a privilege of modifying the node object.