code: public boolean toBoolean(Element el, String attributeName, boolean defaultValue) {
  	String value = el.getAttribute(attributeName);
  	if (value == null) return defaultValue;
  	return Caster.toBooleanValue(value, false);
      }
docs: reads a XML Element Attribute ans cast it to a boolean value
  
  @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