1. ISO/IEC 10026–1, Information Technology — Open Systems Interconnection — Distributed Transaction Processing — Part 1: Model, 1992
2. ISO/IEC 10026–2, Information Technology — Open Systems Interconnection — Distributed Transaction Processing — Part 2: Service Definition, 1992
3. ISO/IEC 10026–3, Information Technology — Open Systems Interconnection — Distributed Transaction Processing — Part 3: Protocol Specification, 1992
4. X/Open CAE Specification C210, CPI-C, 1992
5. X/Open Guide G120, Distributed Transaction Processing: Reference Model, 1991