code: public Date toDate(Element el, String attributeName, Date defaultValue) {
  	return new DateImpl(toDateTime(el, attributeName, defaultValue));
      }
docs: reads a XML Element Attribute ans cast it to a Date
  
  @param el XML Element to read Attribute from it
  @param attributeName Name of the Attribute to read
  @param defaultValue if attribute doesn't exist return default value
  @return Attribute Value