--- a/sxe-document.js
+++ b/sxe-document.js
@@ -1,5 +1,26 @@
 'use strict';
 
+/** Copyright (c) 2012 Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
+  *
+  * Permission is hereby granted, free of charge, to any person obtaining a copy
+  * of this software and associated documentation files (the "Software"), to
+  * deal in the Software without restriction, including without limitation the
+  * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+  * sell copies of the Software, and to permit persons to whom the Software is
+  * furnished to do so, subject to the following conditions:
+  *
+  * The above copyright notice and this permission notice shall be included in
+  * all copies or substantial portions of the Software.
+  *
+  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+  * IN THE SOFTWARE.
+  */
+
 var Document = function(initiator, name, host, domId, prolog) {
   this.initiator = initiator;
   this.name = name;
@@ -81,13 +102,13 @@ Document.prototype = {
 
       switch (change) {
         case 'new':
-          doc.add(jid, child);
+          this.add(jid, child);
           break;
         case 'set':
-          doc.update(jid, child);
+          this.update(jid, child);
           break;
         case 'remove':
-          doc.remove(jid, child);
+          this.remove(jid, child);
           break;
         case 'document-end':
           this.state = 'started';
@@ -95,8 +116,11 @@ Document.prototype = {
       }
     }
   },
-  createState: function(root, parent, state) {
+  createState: function(state, root, parent) {
+    if (!root)
+      root = this.dom;
     var children = root.childNodes;
+
     for (var i = 0; i < children.length; i++) {
       var child = children[i];
       var element = document.createElementNS(Lightstring.NS.sxe, 'new');
@@ -116,6 +140,7 @@ Document.prototype = {
           //TODO: move that elsewhere, or make it prettier.
           var convertAttr = function(attr) {
             var element = document.createElementNS(Lightstring.NS.sxe, 'new');
+            element.setAttributeNS(null, 'type', 'attr');
             var arid = Lightstring.newId('GUID');
             element.setAttributeNS(null, 'rid', arid);
             element.setAttributeNS(null, 'parent', rid);
@@ -129,7 +154,7 @@ Document.prototype = {
           for (var j = 0; j < child.attributes.length; j++)
             convertAttr(child.attributes[j]);
 
-          state = this.createState(child, rid, state);
+          state = this.createState(state, child, rid);
           break;
 
         case 3:
@@ -153,5 +178,10 @@ Document.prototype = {
       }
     }
     return state;
+  },
+  empty: function() {
+    var children = this.dom.childNodes;
+    for (var i = children.length - 1; i >= 0; i--)
+      this.dom.removeChild(children[i]);
   }
 };