value = attribute.getInstanceValue(element);
value = attribute.getInstanceValue(element, appName);
				public void apply(Attribute attribute) throws IOException {					if (!first)						out.write(",");					first = false;					String value;					try {						value = attribute.getInstanceValue(element);					} catch (MissingNodeException e) {						value = "?";					}					out.write(value);				}