Custom tag that iterates the elements of a message collection. It defaults
to retrieving the messages from Action.ERROR_KEY, but if the
message attribute is set to true then the messages will be retrieved from
Action.MESSAGE_KEY. This is an alternative to the default
ErrorsTag.
This class is a subclass of the class
org.apache.struts.taglib.html.MessagesTag which provides most
of the described functionality. This subclass allows all attribute values
to be specified as expressions utilizing the JavaServer Pages Standard
Library expression language.
version: $Rev: 471754 $