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Information describing which authentication context the requester desires the identity provider to use in authenticating the Principal.
Figure 17. Schema fragment for lib:RequestAuthnContext
<xs:element name="RequestAuthnContext">
  <xs:complexType>
    <xs:sequence>
      <xs:choice>
        <xs:element name="AuthnContextClassRef" type="xs:anyURI" maxOccurs="unbounded"/>
        <xs:element name="AuthnContextStatementRef" type="xs:anyURI" maxOccurs="unbounded"/>
      </xs:choice>
      <xs:element name="AuthnContextComparison"
          type="AuthnContextComparisonType" minOccurs="0"/>
    </xs:sequence>
  </xs:complexType>
</xs:element>
LassoLibRequestAuthnContext *
lasso_lib_request_authn_context_new (void);
Creates a new LassoLibRequestAuthnContext object.
struct LassoLibRequestAuthnContext {
	LassoNode parent;
	/* <xs:element name="AuthnContextClassRef" type="xs:anyURI" maxOccurs="unbounded"/> */
	GList *AuthnContextClassRef; /* of strings */
	/* <xs:element name="AuthnContextStatementRef" type="xs:anyURI" maxOccurs="unbounded"/> */
	GList *AuthnContextStatementRef; /* of strings */
	/* <xs:element name="AuthnContextComparison" type="AuthnContextComparisonType"
	 *   minOccurs="0"/> */
	char *AuthnContextComparison;
};