IBM 5280 Distributed Data System - Index of

-------Byte Groups: Repeated for each field inthe edit format controi string.""•I 'IHeader bytes: 3 header bytes always begin a format control string. If datadirected formatting is used, these bytes specify the condition characterinformation.e End Flag and Displacement: 1 or 3 bytes that indicate the last control stringin a series and specify the displacement of the field from the previous field.e Edit Flags: 1 byte that indicates data types and edit control information.E) Buffer and Storage Specifications: 4 bytes indicate buffer length and thelength and address of the storage area to which, or from which, data is moved.o Optional Bytes: See Second Optional Edit Control Byte and PictureSpecification under Byte Groups.Header BytesThe first 3 bytes of a control string are header bytes. If a condition character is usedfor data directed formatting, the header bytes specify the condition character andthe position in the record where the condition character is located.o Condition Character Position: The displacement minus 1 from the left of theI/O buffer where the character is located. If no condition character is specified,these bytes contain hex FFFF.GCondition Character: If no condition character is specified, this byte contains ablank (hex 40).The header bytes are followed by a series of field description and edit controlbytes. Each field in the record is represented by one group of bytes, which beginwith the end flag and displacement bytes.112