I was reading SAML SSO configuration article and found there is no need to update web.xml to implement SAML authentication from version 7.4. Also, new servlet definition doesn't have AuthService param. I was wondering how pega identify auth service from url. I suppose system is using authentication alias in the url to identify the auth service, but I would like to know more details on this.
Thanks for the link, but I didn't see information which I am looking for in the help. My question is why there is no need of updates in Web.xml for authentication service and how pega find authentication service rule.