This attribute assigns a variable name to a SAML artifact. The artifact is bounded-size data that identifies an assertion and a source site. It is carried as part of a URL query string and conveyed by redirection to the destination site. The default name is SAMLart . Using the default SAMLart, the redirect query string could be http://host:port /deploy-URI/ SamlAwareServlet?TARGET=target-URL /&SAMLart=artifact123.