In IMS/VS message format service, a character used to pad input message fields or output device fields when the length of the received data is less than the length defined for the field or when no data is received for the field.

• 在IBM的IMS/VS系统的报文格式服务程序中，当输入报文字段或输出设备字段所接收的数据长度小于规定的长度或未接收到数据时，用来填充该字段的字符。