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diff --git a/sleekxmpp/plugins/xep_0128/extended_disco.py b/sleekxmpp/plugins/xep_0128/extended_disco.py
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+++ b/sleekxmpp/plugins/xep_0128/extended_disco.py
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+"""
+    SleekXMPP: The Sleek XMPP Library
+    Copyright (C) 2010 Nathanael C. Fritz, Lance J.T. Stout
+    This file is part of SleekXMPP.
+
+    See the file LICENSE for copying permission.
+"""
+
+import logging
+
+import sleekxmpp
+from sleekxmpp import Iq
+from sleekxmpp.xmlstream import register_stanza_plugin
+from sleekxmpp.plugins.base import base_plugin
+from sleekxmpp.plugins.xep_0004 import Form
+from sleekxmpp.plugins.xep_0030 import DiscoInfo
+from sleekxmpp.plugins.xep_0128 import StaticExtendedDisco
+
+
+class xep_0128(base_plugin):
+
+    """
+    XEP-0128: Service Discovery Extensions
+
+    Allow the use of data forms to add additional identity
+    information to disco#info results.
+
+    Also see <http://www.xmpp.org/extensions/xep-0128.html>.
+
+    Attributes:
+        disco  -- A reference to the XEP-0030 plugin.
+        static -- Object containing the default set of static
+                  node handlers.
+        xmpp   -- The main SleekXMPP object.
+
+    Methods:
+        set_extended_info -- Set extensions to a disco#info result.
+        add_extended_info -- Add an extension to a disco#info result.
+        del_extended_info -- Remove all extensions from a disco#info result.
+    """
+
+    def plugin_init(self):
+        """Start the XEP-0128 plugin."""
+        self.xep = '0128'
+        self.description = 'Service Discovery Extensions'
+
+        self._disco_ops = ['set_extended_info',
+                           'add_extended_info',
+                           'del_extended_info']
+
+        register_stanza_plugin(DiscoInfo, Form, iterable=True)
+
+    def post_init(self):
+        """Handle cross-plugin dependencies."""
+        base_plugin.post_init(self)
+        self.disco = self.xmpp['xep_0030']
+        self.static = StaticExtendedDisco(self.disco.static)
+
+        self.disco.set_extended_info = self.set_extended_info
+        self.disco.add_extended_info = self.add_extended_info
+        self.disco.del_extended_info = self.del_extended_info
+
+        for op in self._disco_ops:
+            self.disco._add_disco_op(op, getattr(self.static, op))
+
+    def set_extended_info(self, jid=None, node=None, **kwargs):
+        """
+        Set additional, extended identity information to a node.
+
+        Replaces any existing extended information.
+
+        Arguments:
+            jid  -- The JID to modify.
+            node -- The node to modify.
+            data -- Either a form, or a list of forms to use
+                    as extended information, replacing any
+                    existing extensions.
+        """
+        self.disco._run_node_handler('set_extended_info', jid, node, kwargs)
+
+    def add_extended_info(self, jid=None, node=None, **kwargs):
+        """
+        Add additional, extended identity information to a node.
+
+        Arguments:
+            jid  -- The JID to modify.
+            node -- The node to modify.
+            data -- Either a form, or a list of forms to add
+                    as extended information.
+        """
+        self.disco._run_node_handler('add_extended_info', jid, node, kwargs)
+
+    def del_extended_info(self, jid=None, node=None, **kwargs):
+        """
+        Remove all extended identity information to a node.
+
+        Arguments:
+            jid  -- The JID to modify.
+            node -- The node to modify.
+        """
+        self.disco._run_node_handler('del_extended_info', jid, node, kwargs)