old_contents: AMP = "http://jabber.org/protocol/amp"
  DISCO_INFO = "http://jabber.org/protocol/disco#info"
  DISCO_ITEMS = "http://jabber.org/protocol/disco#items"
  MUC = 'http://jabber.org/protocol/muc'
  MUC_USER = '%s#user' % MUC
  OLPC_ACTIVITIES = "http://laptop.org/xmpp/activities"
  OLPC_ACTIVITIES_NOTIFY = "%s+notify" % OLPC_ACTIVITIES
  OLPC_ACTIVITY = "http://laptop.org/xmpp/activity"
  OLPC_ACTIVITY_PROPS = "http://laptop.org/xmpp/activity-properties"
  OLPC_ACTIVITY_PROPS_NOTIFY = "%s+notify" % OLPC_ACTIVITY_PROPS
  OLPC_BUDDY = "http://laptop.org/xmpp/buddy"
  OLPC_BUDDY_PROPS = "http://laptop.org/xmpp/buddy-properties"
  OLPC_BUDDY_PROPS_NOTIFY = "%s+notify" % OLPC_BUDDY_PROPS
  OLPC_CURRENT_ACTIVITY = "http://laptop.org/xmpp/current-activity"
  OLPC_CURRENT_ACTIVITY_NOTIFY = "%s+notify" % OLPC_CURRENT_ACTIVITY
  PUBSUB = "http://jabber.org/protocol/pubsub"
  STANZA = "urn:ietf:params:xml:ns:xmpp-stanzas"
  
new_contents: AMP = "http://jabber.org/protocol/amp"
  DISCO_INFO = "http://jabber.org/protocol/disco#info"
  DISCO_ITEMS = "http://jabber.org/protocol/disco#items"
  MUC = 'http://jabber.org/protocol/muc'
  MUC_OWNER = '%s#owner' % MUC
  MUC_USER = '%s#user' % MUC
  OLPC_ACTIVITIES = "http://laptop.org/xmpp/activities"
  OLPC_ACTIVITIES_NOTIFY = "%s+notify" % OLPC_ACTIVITIES
  OLPC_ACTIVITY = "http://laptop.org/xmpp/activity"
  OLPC_ACTIVITY_PROPS = "http://laptop.org/xmpp/activity-properties"
  OLPC_ACTIVITY_PROPS_NOTIFY = "%s+notify" % OLPC_ACTIVITY_PROPS
  OLPC_BUDDY = "http://laptop.org/xmpp/buddy"
  OLPC_BUDDY_PROPS = "http://laptop.org/xmpp/buddy-properties"
  OLPC_BUDDY_PROPS_NOTIFY = "%s+notify" % OLPC_BUDDY_PROPS
  OLPC_CURRENT_ACTIVITY = "http://laptop.org/xmpp/current-activity"
  OLPC_CURRENT_ACTIVITY_NOTIFY = "%s+notify" % OLPC_CURRENT_ACTIVITY
  PUBSUB = "http://jabber.org/protocol/pubsub"
  STANZA = "urn:ietf:params:xml:ns:xmpp-stanzas"
  
subject: add namespace for MUC owner to ns.py