This structure contains a PrincipalTypes value and an identifier for the principal. The schema for this type MUST be as follows:

   <complexType name="PrincipalType">
       <element name="Type" type="msis:PrincipalTypes"/>
       <element name="Identifier" type="string"/>

Type: A PrincipalTypes enumeration value identifying the type of the SAML principal.

Identifier: An identifier for the SAML principal. This is a SAML EntityId.