The predetermined mandatory order, organization or position of symbols in a computer instruction, data or word, data transmission message, etc. The order is mandatory so that the computer can understand and interpret the information.对计算机的指令、数据或字以及数据传输所预先确定的且必须遵循的各种符号的次序、结构或位置。次序必须遵循，否则计算机不能理解和解释信息。
