pub const DISCO_INFO_NS: &'static str = "http://jabber.org/protocol/disco#info"; pub const DATA_FORMS_NS: &'static str = "jabber:x:data"; pub const MEDIA_ELEMENT_NS: &'static str = "urn:xmpp:media-element"; pub const JINGLE_NS: &'static str = "urn:xmpp:jingle:1"; pub const PING_NS: &'static str = "urn:xmpp:ping";