p = xmlAddAttribute(n,a,x)
i1 : n = xmlParse ///<bar>asdf</bar>/// o1 = <bar>asdf</bar> o1 : LibxmlNode (xmlTypeDescription)
i2 : a = xmlAddAttribute(n,"foo","the value") o2 = foo = "the value" o2 : LibxmlAttribute
i3 : xmlGetName a o3 = foo
i4 : n o4 = <bar foo="the value">asdf</bar> o4 : LibxmlNode (xmlTypeDescription)