Document title: SAML Protocol Extension Schema for Specifying Authentication Context Combinations Document identifier: sstc-saml-protocol-ext-rac.xsd Location: http://www.oasis-open.org/committees/documents.php?wg_abbrev=security Revision history: V3.0 (September 2006) The RequestedACCombination Extension MUST NOT occur any other place than in the Extension element of an AuthnRequest message.