code: public void assignModel(XLog log, String model) {
  		if (model != null && model.trim().length() > 0) {
  			XAttributeLiteral modelAttr = (XAttributeLiteral) ATTR_MODEL
  					.clone();
  			modelAttr.setValue(model.trim());
  			log.getAttributes().put(KEY_MODEL, modelAttr);
  		}
  	}
docs: Assigns a value for the lifecycle model identifier to a given log.
  
  @param log
  Log to be tagged.
  @param model
  Lifecycle model identifier string to be used.