The AssertionIDRef element makes a reference to a SAML assertion by its unique identifier.
The specific authority who issued the assertion or from whom the assertion can be
obtained is not specified aspart of the reference.
: 2.0, 3.0, 3.5, 4.0, 4.5.x, 4.6.x and later
: ComponentPro.Saml (in ComponentPro.Saml.dll)