returns the xml namespace of the extension sub-packet root element . according the specification the namespace is always `` http://jabber.org/protocol/offline '' concode_field_sep String node concode_field_sep PacketExtension parseExtension concode_elem_sep void setNode concode_elem_sep String toXML concode_elem_sep String getNode concode_elem_sep String getElementName
String function ( ) { return "srini_string" ; }