code: public XAttributeTimestamp createAttributeTimestamp(String key, Date value,
  			XExtension extension) {
  		return new XAttributeTimestampImpl(intern(key), value, extension);
  	}
docs: /* (non-Javadoc)
  @see org.deckfour.xes.model.factory.XModelFactory#createAttributeTimestamp(java.lang.String, java.util.Date, org.deckfour.xes.extension.XExtension)