Evaggelia wants to adopt an open standard to provide authentication, authorization, and attribute information as part of her cloud identity federation efforts. What standard should she adopt to leverage the flexibility of XML as part of her efforts?

SAML is an open, XML-based standard used to provide authorization, attribute information, and authentication data. SOAP, or Simple Object Access Protocol, is a messaging protocol and could be used for any XML messaging but is not a markup language itself. OAuth is an authorization framework that exchanges information using APIs, and OpenID Connect is an authentication layer using OAuth that provides both authentication and authorization, but not attribute information.