This part of ISO/IEC 11518 provides data framing for a high-performance point-to-point interface between data-processing equipment. This part of ISO/IEC 11518 does not protect against certain errors that might be introduced by intermediate devices interconnecting multiple HIPPI-PHs. The purpose of this part of ISO/IEC 11518 is to facilitate the development and use of the HIPPI in computer systems by providing common data framing. It provides an efficient framing protocol for interconnections between computers, high-performance display systems, and high-performance, intelligent block-transfer peripherals.