Preface Standards development within the Information Technology sector is harmonized with international standards development. Through the CSA Technical Committee on Information Technology (TCIT), Canadians serve as the SCC Mirror Committee (SMC) on ISO/IEC Joint Technical Committee 1 on Information Technology (ISO/IEC JTC1) for the Standards Council of Canada (SCC), the ISO member body for Canada and sponsor of the Canadian National Committee of the IEC. Also, as a member of the International Telecommunication Union (ITU), Canada participates in the International Telegraph and Telephone Consultative Committee (ITU-T). For brevity, this Standard will be referred to as "CAN/CSA-ISO/IEC 11889-2" throughout. At the time of publication, ISO/IEC 11889-2:2015 is available from ISO and IEC in English only. CSA Group will publish the French version when it becomes available from ISO and IEC. Scope This part of ISO/IEC 11889 contains the definitions of the constants, flags, structure, and union definitions used to communicate with the TPM. Values defined in this part of ISO/IEC 11889 are used by the TPM commands defined in ISO/IEC 11899-3 and by the functions in ISO/IEC 11889-4. NOTE The structures in this document are the canonical form of the structures on the interface. All structures are "packed" with no octets of padding between structure elements. The TPM-internal form of the structures is dependent on the processor and compiler for the TPM implementation.